1978 Mercury Cougar Performance and Racing Products

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Popular 1978 Mercury Cougar Performance and Racing Products Categories

Essential Performance and Racing Products for 1978 Mercury Cougars

Motive Gear – Performance Differential Ring and Pinion (Part No.F888410)

Performance Differential Ring and Pinion

from

$230.99


Product Features:
  • FRD 10BLT 8.8 R/P 4.10 MGP
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Hurst – Shifter – Performance (Part No.3737637)

Shifter - Performance

from

$349.99
Shifter – Performance

Mr. Gasket – High Performance Thermostat (Part No.4365)

High Performance Thermostat

from

$32.49
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:
  • Opens At 195 Degrees
  • Designed to Resist Large Variations of Coolant Pressure at High RPM
  • Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
  • For High Performance Street, Drag Race, and Oval Track
  • Copper & Brass Construction – Resists Corrosion
  • High Flow
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Mallory – Distributor Wiring Harness (Part No.29349)

Distributor Wiring Harness

from

$34.49
3-wire for ignition box.

Product Features:
  • Service Part
  • Makes Connections Quick And Easy
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FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1614)

Engine Valve Cover Gasket Set

from

$24.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Die cut silicone rubber gaskets conform to out-of-flat covers
  • Great for on-again/off-again situations
  • Not intended for use in emission controlled vehicles.
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Accel – Super Stock Graphite Custom 8mm (Part No.4056)

Super Stock Graphite Custom 8mm

from

$81.99
ACCEL’s SuperStock 4000 series spark plug wire sets are designed to upgrade an OE ignition system for high-spark delivery levels for street driven applications. The 450 degree F rated silicone jacket is extruded over a tightly woven, rugged fiberglass braid. The braid is applied over high dielectric strength EPDM (Ethylene Propylene Diene Monomer) inner insulation for ignition wire performance that exceeds SAE specifications.

Product Features:
  • 7mm And 8mm High Gloss Silicone Jacket
  • 450 F Rated Silicone Jacket
  • Stainless Steel Plug Terminals
  • RFI Suppression For Street Driven Applications
  • Custom-fit Universal And Import Coverage
  • High-strength Fiberglass Braid Construction
  • Pre And Post HEI Vehicles
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FEL-PRO Performance – Lower Intake Manifold Gasket Set: 5 Piece Set (Part No.1230)

Lower Intake Manifold Gasket Set: 5 Piece Set

from

$38.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
  • SEALING TECHNOLOGIES — Exclusive sealing innovations and technologies with proprietary materials and unique design features to ensure a superior seal for your repair
  • ENGINEERING EXPERTISE — Parts are designed, reviewed, validated and approved by Fel-Pro engineers through rigorous research and development
  • REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
  • EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
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MSD Ignition – Distributor Gear, Ford 302, Non-EFI, Steel (Part No.85833)

Distributor Gear, Ford 302, Non-EFI, Steel

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$145.99
A distributor’s performance is only as good as its drive gear. MSD Performance has put a great deal of effort into researching and testing a variety of metallurgical compositions, heat treating and coatings to provide you with a durable, accurate and strong distributor gear. MSD engineers have built test fixtures and spent hundreds of hours testing and evaluating the metallurgy of our gears. The result is a special alloy gear that is treated to a low-friction coating process. To you this means long life, an easy break-in period and reliable performance.

Product Features:
  • Increased outer hardened layer thickness (RC 55-60) .
  • Micro polished surface for smooth contact.
  • Melonite QPQ coated reduces friction and initial wear.
  • Interstitial carbide concentration improves wear resistance and
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MSD Ignition – Cap and Rotor Kit, Distributor Style, Compatible with PN 8408 / PN 8423 (Part No.84085)

Cap and Rotor Kit, Distributor Style, Compatible with PN 8408 / PN 8423

from

$67.99
The cap and rotor of any ignition system must be considered mainte­nance items. Just as you change the oil and filter of your car, you should always replace the cap and rotor as a set. To make things easy, we now offer these Cap and Rotor Replacement Kits.

Product Features:
  • Injection molded housing from DuPont material
  • Extreme strength; high dielectric properties
  • Designed w/Performance In Mind
  • High quality; voltage insulating material
  • Stainless Steel Rotor Tip Design
  • Resist carbon tracking
  • Max voltage transfer
  • Stainless Terminals
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Competition Cams – 1 Spring (Part No.26113-1)

1 Spring

from

$24.99
1 Spring

Competition Cams – High Energy 6.881" Long, 5/16" Diameter Pushrod – Set of 16 (Part No.7831-16)

High Energy 6.881" Long, 5/16" Diameter Pushrod - Set of 16

from

$66.99
High Energy Pushrods from COMP Cams are an affordable, high quality solution when building street rods, RVs and daily drivers. High Energy Pushrods have a durable one-piece construction that meets or exceeds all OE pushrod specifications and fit perfectly with High Energy and Magnum Rocker Arms.

Product Features:
  • 5/16″ diameter, 6.881″ length for Small Block Ford 255 and 302, ’65-up with Flat Tappet Cam
  • Best choice when building street rods, RVs or daily drivers
  • Meet or exceed all OE pushrod specifications
  • Mate perfectly with High Energy and Magnum Rockers
  • Durable one-piece construction
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Edelbrock – Performer-Link Adjustable True-Roller Timing Chain Set (Part No.7830)

Performer-Link Adjustable True-Roller Timing Chain Set

from

$85.99


Product Features:
  • Solid Bushing Chain Resists Stretching
  • For Use with Stock or Edelbrock Camshafts
  • Stressproof Steel Crank Gears
  • 3 Keyway Setting Points To Ensure Accurate Timing
  • True Bearing Surface Rolls with the Sprockets
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Mr. Gasket – Thermocap Radiator Cap (Part No.2471S)

Thermocap Radiator Cap

from

$53.99
Knowing your coolant temperature can help to prevent burn injuries. Thermocap Cap, with its built-in calibrated thermometer, indicates the coolant temperature. This is useful information prior to cap removal. Never attempt to remove Thermocap Cap when the coolant temperature is very hot. The escaping hot coolant and steam may burn you. Reclamation valve works great with your coolant recovery system. Your radiator can reclaim coolant from your overflow bottle. Wide 30 degree to 270 degree F temperature range. Calibrated in centigrade and Fahrenheit. Color-coded temperature ranges.

Product Features:
  • Indicates Coolant Temperature
  • Helps to Prevent Injuries from coolant or steam burns
  • Integrated Coolant Reclamation Valve
  • Improves Underhood Appearance
  • Fahrenheit and centigrade readings
  • Various valve pressures available
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Mr. Gasket – Cam Change Gaskets (Part No.4410)

Cam Change Gaskets

from

$74.99
If you want to update just your camshaft and aren’t doing a complete engine overhaul, this kit contains all the gaskets needed to change out your camshaft. That way you don’t have to buy a complete gasket kit just to change the cam, but still can replace all the gaskets you should in the process.

Product Features:
  • Contains all the gaskets needed to change out your camshaft
  • Fuel Injector O-Ring Not Included
  • Meets Performance Standards
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Energy Suspension – Control Arm Bushing Set (Part No.4.3123G)

Control Arm Bushing Set

from

$68.99
For both front and rear of suspensions on cars, trucks and SUVs. Made of Energy’s Hyper-Flex performance polyurethane for optimum performance and durability. Maintains proper alignment under extreme conditions on the street, track or off-road. Improves vehicle handling, cornering and overall control. Full floating for smoother, efficient operation. Outlasts and outperforms rubber.

Product Features:
  • Maintains Better Alignment While Driving
  • Full Floating And Non Binding
  • Fits Into The Remaining Stock Control Arms
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MSD Ignition – Starter (Part No.5090)

Starter

from

$488.99
Our DynaForce starter is designed to crank over the highest compression engines on a hot day in Death Valley. Not that too many race cars are sitting in Death Valley, but it’s good to know that you have the oomph to make it happen. The DynaForce starter features all new components beginning with a three horsepower motor. This power is used to crank over the reduced 4.4:1 gear set to deliver great torque to the engine’s ring gear to get the engine turning. The downsized housing clears most headers and oil pans, but just in case, we made the billet mount so it can be clocked in different positions to help in tight applications. The assembly is powder coated MSD red and will stay looking good, even though it’s underneath your car.

Product Features:
  • 3/4″ Depth and can be used on 157 and 164 Tooth Flywheels
  • Downsized design helps clearance issues w/oil pans and exhaust
  • Ball bearing supported armature and pinion gear
  • 3 Hp Motor Provides Power For High Compression Engines
  • Gear reduction of 4.4:1 improves torque for great cranking
  • Downsized design helps clearance issues
  • Mount can be clocked to assist in mounting
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FEL-PRO Performance – Cylinder Head Gasket: Steel Core Composite, Without Head Bolts (Part No.1011-2)

Cylinder Head Gasket: Steel Core Composite, Without Head Bolts

from

$52.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • PROPRIETARY COATING – Nonstick anti-friction coating seals small surface imperfections
  • NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
  • SUPERIOR SEAL – Precise embossed Printoseal sealing beads at all vital areas to eliminate leak paths
  • STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
  • DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
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MSD Ignition – Rotor – Ford V8 Cap-A-Dapt (Part No.8407)

Rotor - Ford V8 Cap-A-Dapt

from

$17.49
For optimum voltage carrying capabilities the rotor tips are made from low resistance brass for maximum voltage transfer.

Product Features:
  • Resist Carbon Tracking
  • Low Resistance Brass
  • Max voltage transfer
  • Molded from insulated material
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FEL-PRO Performance – PERFORMANCE OIL PAN GASKET SET (Part No.1811)

PERFORMANCE OIL PAN GASKET SET

from

$30.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Felcoid/Plus gaskets have a fiber sheet core and a latex rubber coating to eliminate potential leakage paths. The core material resists crushing and splitting, while providing excellent blowout resistance.
  • With steel core to provide ultimate excellent blowout resistance.
  • Not intended for use in emission controlled vehicles.
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B & M – Flexplate, Small Block Ford 28.2 Ounce 157 Tooth (Part No.50236)

Flexplate, Small Block Ford 28.2 Ounce 157 Tooth

from

$179.99
As performance levels increase, an O.E. style flexplate just won’t cut it and a stronger option is a necessity to prevent transmission and/or converter failure. B&M has you covered with our high performance flexplate designed for Ford, Lincoln and Mercury (externally balanced) 289 and 302ci V8 engines with 28.2 ounce imbalance. Features include high tensile strength steel to resist elongation and cracking, 10.50 inch bolt pattern and 157 tooth ring gear. The assembly is then Zinc plated and treated with a Chromate Conversion Coating for added corrosion resistance and durability. B&M flexplates are ideal for hot rods, street cars, tow vehicles or other vehicles needing the added protection and toughness that B&M has been delivering since 1953. Compatible with C4 and C6 automatic transmissions.

Product Features:
  • NHRA/IHRA Legal For All Classes
  • Includes SFI Certification Sticker
  • Ideal For Street Applications
  • To Extreme Duty Racing
  • To High RPM Use
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Competition Cams – Rocker Arms,FS/FW 1.6 7/16 Ultra Pro Mag (Part No.1632-16)

Rocker Arms,FS/FW 1.6 7/16 Ultra Pro Mag

from

$476.99
Rocker Arms,FS/FW 1.6 7/16 Ultra Pro Mag

Mr. Gasket – Rear Main Seal Gasket (Part No.30)

Rear Main Seal Gasket

from

$49.99
This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It is a direct replacement for a factory one-piece rubber main seal. It’s also injection molded for a precise fit.

Product Features:
  • Repairs that leaky rear main seal
  • Direct replacement for stock one-piece seal
  • Silicone rubber to withstand extreme oil temperatures
  • Injection molded for precise fit
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Energy Suspension – Sway Bar Set – 1 in. (Part No.4.5111R)

Sway Bar Set - 1 in.

from

$20.99
Energy Suspension performance polyurethane sway bar bushings and end links offer the greatest improvement in performance among all the products Energy offers. They make a vehicle’s sway bar system much more effective like adding a larger, higher performance sway bar. Economy, increased efficiency, and easy installation are just some of the reasons these products are so popular. Made of Hyper-Flex polyurethane that lasts much longer than O.E.M. rubber bushings.

Product Features:
  • Allows Sway Bar System To Work At 100% Efficiency
  • Lasts Much Longer Than OEM Rubber Bushings
  • Handling Characteristics Improve Dramatically
  • Lasts Much Longer Than OEM Rubber Bushings
  • Handling Characteristics Improve Dramatically
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Competition Cams – Valve Seals, Umbrella 11/32" 1 St (Part No.502-16)

Valve Seals, Umbrella 11/32" 1 St

from

$230.99
COMP Cams offers a complete line of valve stem seals, from the umbrella seals to the positive-stop Teflon seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The umbrella seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop Teflon seal is used. The umbrella seals require no machining, but with the Teflon seal it is necessary to disassemble the heads and machine the top of the guide with a special .530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don’t forget the valve seals.

Product Features:
  • Work with stock guides and 11/32″ valve stem diameter
  • Valve stem oil seals keep unwanted oil from entering the combustion chamber
  • Several different types of valve seals are offered
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Accel – Ford 1984-98 Eec-Iv Supercoil (Part No.140012)

Ford 1984-98 Eec-Iv Supercoil

from

$86.99
Engineered with optimized low resistance, high turns ratio windings around an M36 high silicone magnetic steel E-core for higher energy and voltage outputs. Results in quicker starts, improved idle quality, and crisper throttle response. Compatible with late model Ford EEC-IV computer controlled ignition system equipped with a TFI distributor. Direct OEM replacement. Can also be used with an ACCEL, Mallory, Crane, Holley or MSD capacitive discharge ignition system. Special high temperature epoxy resists shock and vibration, while increasing thermal conductivity. Brass coil wire contact increases energy efficiency and resists corrosion better than aluminum. High dielectric strength ACCEL Yellow over-molded housing.

Product Features:
  • Direct Plug In Replacement Direct OE Fit
  • Advanced Bobbin Technology
  • Standard Motor Products SMP Fd-478
  • MSD 5527
  • Standard Motor Products SMP Fd-478
  • MSD 5527
  • Resists Shock And Vibration
  • Resists Corrosion
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MSD Ignition – Ignition Coil (Part No.8227)

Ignition Coil

from

$79.99
The MSD Blaster TFI Coil is designed to produce increased voltage and energy over the stock Ford TFI Coil. To get even more ignition performance, install an MSD ignition Control with a PN 8874 Harness for a direct plug-in installation.

Product Features:
  • Direct performance replacement for Ford TFI coil
  • 85:1 turns ratio and lower primary resistance produce high voltage output
  • Works with stock ignition as well as MSD Ignitions
  • CARB E.O. Approved
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Mr. Gasket – Valve Cover (Part No.9804)

Valve Cover

from

$85.99
These valve covers are constructed of a heavy gauge steel that will also help to prevent leaks around sealing flanges. Sold as a pair.

Product Features:
  • Fits Ford small block
  • Chrome plated steel construction
  • Sold as a pair
  • Chrome Plated
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Edelbrock – Signature Series Valve Covers for Ford 429/460 V8 (Part No.4463)

Signature Series Valve Covers for Ford 429/460 V8

from

$90.99
The Edelbrock #4463 Signature Series Valve Covers are designed for Ford 429/460 V8 applications. Engineered for function and styled for great looks, Signature Series valve covers have stock-style breather baffles that prevent oil passage to the PCV valve. These quality valve covers accept all emissions equipment, including PCV valve holes. Rubber grommets for the breather and PCV valve holes are included. Matching breathers sold separately.

Product Features:
  • Big Block Ford 428-460
  • Short
  • Chrome Steel
  • Set Of Two
  • Rubber Grommets For Breather
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Upgrade your 1978 Mercury Cougar with Top-Quality Performance and Racing Products

When it comes to maintaining or upgrading your 1978 Mercury Cougar, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Mercury or enhancing its overall performance, Performance and Racing Products are key to keeping your Cougar functioning at its best. At Advance Auto Parts, we offer a wide selection of 286 Performance and Racing Products for the 1978 Mercury Cougar, designed to meet your needs without breaking the bank. From Performance Fuel System replacements to Performance Steering Products upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Performance and Racing Products for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Performance and Racing Products for your 1978 Mercury Cougar at great prices. Our Performance and Racing Products inventory for this model ranges from just $5.99 to $1,095.99, with an average price of $244.33. Our 286 Performance and Racing Products in stock come from 14 trusted brands, so you’re sure to find the right part for your 1978 Mercury Cougar without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 1978 Mercury Cougar, we stock popular OEM and aftermarket Performance and Racing Products from top names like B & M, FEL-PRO Performance, MSD Ignition, and more. B & M Performance and Racing Products start at just $349.99 and boast an impressive 4.3 stars average rating from customers. FEL-PRO Performance and MSD Ignition also bring quality to the table, with Performance and Racing Products available starting at $28.99, and at an average 4.2 stars rating. With 598 customer reviews and counting, our 1978 Mercury Cougar Performance and Racing Products have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Performance and Racing Product upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 1978 Mercury Cougar is always ready to roll. We’re committed to providing you with everything you need to keep your Cougar in top shape, all in one place. Start shopping confidently below for your 1978 Mercury Cougar!

Best-Selling Performance Fuel Systems for 1978 Mercury Cougars

Enhance the driving experience in your Mercury with 3 quality Performance Fuel System components, starting at $19.49.

Holley – Mechanical Fuel Pump (Part No.12-289-11)

Mechanical Fuel Pump

from

$185.99
Mechanical fuel pump made from heavy duty construction for continuous high RPM operation. Fuel body casting can be rotated to accommodate various plumbing situations. Fuel pressure regulator is not required.

Product Features:
  • High Output Fuel Flow
  • Flows 110 gph Free Flow
  • Shutoff Pressure Pre-Set From 6.5 To 8 PSI
  • Fuel Pressure Regulator Is Not Required
  • Heavy Duty Construction For Continuous High rpm Operation
  • Fuel Body Casting Can Be Rotated For Plumbing Situations
  • Inlet And Outlet Tapped For 3/8 in. NPT
  • Inlet/Outlet Tapped For 3/8 in. NPT
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Mr. Gasket – Fuel Pump Block-Off Plate (Part No.1517)

Fuel Pump Block-Off Plate

from

$19.49
Block-off plates are precision cut to cover stock fuel pump openings. Gasket included.

Product Features:
  • Chrome Plated Steel
  • Gasket Included
  • Easy Installation
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Holley – Keith Dorton Series; VoluMax Race Series Fuel Pump (Part No.12-289-20)

Keith Dorton Series; VoluMax Race Series Fuel Pump

from

$255.99
Keith Dorton Series VoluMax race series fuel pump made from heavy duty construction for continuous high RPM operation. Redesigned high flow valves always ensure adequate fuel delivery. Fuel pressure regulator is required. Fuel body casting can be rotated

Product Features:
  • High Output Fuel Flow
  • Flows 170+ gph Free Flow
  • Shutoff Pressure Pre-Set At 8 PSI
  • Fuel Pressure Regulator Is Not Required
  • Heavy Duty Construction For Continuous High rpm Operation
  • Redesigned High Flow Valves Always Ensure Adequate Fuel Delivery
  • Fuel Body Casting Can Be Rotated For Plumbing Situations
  • Inlet And Outlet Tapped For 3/8 in. NPT
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Most Popular 1978 Mercury Cougar Performance Steering Products

Customize your Mercury with 5 Performance Steering Products products like Performance Sway Bar Link Kits and Performance Tie Rod End Boots, all priced under $29.99.

Energy Suspension – Sway Bar End Link Kit (Part No.9.8118R)

Sway Bar End Link Kit

from

$29.99
Made of high durometer, very firm, Hyper-Flex performance polyurethane. They’re economical, increase efficiency and are easy to install. Use Energy Suspension sway bar end links with sway bar bushings to get the maximum performance benefit. Combine both for the same effect as buying a larger sway bar. Together they offer a dramatic improvement in performance and handling.

Product Features:
  • Made from HYPER-Flex Polyurethane
  • Allows Vehicle to Work At Maximum Efficiency
  • Easy to Install
  • Superior Performance and Greater Longevity
  • Lasts Much Longer Than OEM Rubber End Links
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Energy Suspension – Tie Rod Dust Boot (Part No.9.13101G)

Tie Rod Dust Boot

from

$5.99
Repair torn and worn-out boots of suspension tie rod ends – without having to buy the entire and expensive tie rod. Adds durability surpassing most OEM rubber boots. Exclusive 5 point sealing action. Choose from four sizes and round or octagon styles. Made of Energy’s Hyper-Flex performance polyurethane for added performance and durability.

Product Features:
  • Easy to Install
  • Superior Material
  • Saves Your Tie Rods
  • Lasts Longer
  • Looks Great
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Energy Suspension – Tie Rod End Boot (Octagon) – 2-Pack (Part No.9.13102R)

Tie Rod End Boot (Octagon) - 2-Pack

from

$6.29
Repair torn and worn-out boots of suspension tie rod ends – without having to buy the entire and expensive tie rod. Adds durability surpassing most OEM rubber boots. Exclusive 5-point sealing action. Choose from four sizes and round or octagon styles. Made of Energy’s Hyper-Flex performance polyurethane for added performance and durability.

Product Features:
  • Easy To Install
  • Superior Material
  • Saves Your Tie Rods
  • Lasts Longer
  • Looks Great
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Energy Suspension – Sway Bar End Link Kit (Part No.9.8118G)

Sway Bar End Link Kit

from

$29.99
Made of high durometer, very firm, Hyper-Flex performance polyurethane. They’re economical, increase efficiency and are easy to install. Use Energy Suspension sway bar end links with sway bar bushings to get the maximum performance benefit. Combine both for the same effect as buying a larger sway bar. Together they offer a dramatic improvement in performance and handling.

Product Features:
  • Made from HYPER-Flex Polyurethane
  • Allows Vehicle to Work At Maximum Efficiency
  • Easy to Install
  • Superior Performance and Greater Longevity
  • Lasts Much Longer Than OEM Rubber End Links
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Energy Suspension – Tie Rod End Boot (Octagon) – 2-Pack (Part No.9.13102G)

Tie Rod End Boot (Octagon) - 2-Pack

from

$6.29
Repair torn and worn-out boots of suspension tie rod ends – without having to buy the entire and expensive tie rod. Adds durability surpassing most OEM rubber boots. Exclusive 5-point sealing action. Choose from four sizes and round or octagon styles. Made of Energy’s Hyper-Flex performance polyurethane for added performance and durability.

Product Features:
  • Easy To Install
  • Superior Material
  • Saves Your Tie Rods
  • Lasts Longer
  • Looks Great
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Top Picks for 1978 Mercury Cougar Performance Ignition Products

Upgrade Mercury Cougars with top-quality Performance Ignition Products parts, including 8 OEM and aftermarket selections for your 1978 model.

Mallory – Unilite Ignition Module (Part No.605)

Unilite Ignition Module

from

$95.99
Requires a 1.4 ohms Ballast resistor, Loom resistor or internally resisted coil.

Product Features:
  • Service Part
  • No Moving Parts To Wear Out
  • Self Contained Unit
  • Can Drive OEM
  • Can Drive High Performance Ignition Coils
See More

MSD Ignition – Wire Set – Black Super Conductor, Ford 302/351W, HEI (Part No.31323)

Wire Set - Black Super Conductor, Ford 302/351W, HEI

from

$163.99
Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire; incredibly low resistance without electronic interference. In a single 12 inch length of Super Conductor Wire there is only 40 – 50 ohms of resistance. That is the lowest resistance of any helically wound wire. To accomplish this, we use a copper alloy conductor due to it’s great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. The conductor is wound extremely tight around a special center core. So tight in fact, that there is over 40 feet of conductor wrapped into a single foot of plug wire. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference (EMI) “choke”. This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. The outer sleeve that surrounds the conductor assembly is just as impressive. A proprietary blend of silicone and synthetic material produce a sleeve that is highly resistant to high heat as well as abrasion and tears. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor.

Product Features:
  • Custom fit for make and model listed.
  • Wires are precut to exact specifications
  • Bolt-on performance
  • Conductor core features DuPont Kevlar material for increased tensile strength
  • Durable outer sleeve is a proprietary compound for resistance to high heat or abrasion
  • Stainless steel terminals feature dual crimp tabs to grip wire conductor and outer jacket separately
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MSD Ignition – Wire Set – Universal Street Fire, 8-Cylinder, HEI/90 Degree (Part No.5552)

Wire Set - Universal Street Fire, 8-Cylinder, HEI/90 Degree

from

$77.99
The Street Fire Spark Plug Wires feature a low resistance conductor that’s wrapped in a sleek and durable black sleeve.

Product Features:
  • Silicone boots protect against high exhaust temps
  • Kevlar core combination for great strength and durability
  • Heavy duty terminals for secure connection
  • 8mm silicone and synthetic jacket resists heat and abrasion
  • 500 Ohms/ft. Resistance For Improved Spark Delivery And Power
  • Silicone boots protect against high exhaust temps
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Accel – Supercoil (Part No.140001)

Supercoil

from

$116.99
Engineered for faster rise time, longer spark duration and increased performance. Unique design with premium grade wire, special low resistance, high turns ratio windings. Produces higher spark energy with breaker less electronic ignition systems. For points application the supplied 0.85 ohm ballast resistor must be used in conjunction with the vehicle original ballast resistor, if so equipped. Oversized molded case with integral cooling fins and high capacity oil filled construction provide high thermal conductivity ensuring cool operation and long life. Extra tall tan Alkyd tower and integral voltage dam eliminate “flashover” to primary terminals. Comes complete with mounting hardware and 0.85 ohm ballast resistor. Effective up to 6,500 RPM.

Product Features:
  • Oil Filled For Better Cooling
  • Optimized Low Resistance
  • Silicon Magnetic Steel E-Core
  • Higher Energy/Voltage Outputs
  • Quicker Starts
  • Improved Idle Quality
  • Resists Shock And Vibration
  • Resists Corrosion
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MSD Ignition – Wire Set – Super Conductor, Ford 351M-400, HEI (Part No.31339)

Wire Set - Super Conductor, Ford 351M-400, HEI

from

$204.99
Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire, incredibly low resistance without electronic interference. In a single 12 inch length of Super Conductor Wire there is only 40 – 50 ohms of resistance. That is the lowest resistance of any helically wound wire. To accomplish this, we use a copper alloy conductor due to it’s great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. The conductor is wound extremely tight around a special center core. So tight in fact, that there is over 40 feet of conductor wrapped into a single foot of plug wire. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference (EMI) “choke”. This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. The outer sleeve that surrounds the conductor assembly is just as impressive. A proprietary blend of silicone and synthetic material produce a sleeve that is highly resistant to high heat as well as abrasion and tears. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps, one for the sleeve of the wire and another separate crimp to grasp the conductor. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps, one for the sleeve of the wire and another separate crimp to grasp the conductor.

Product Features:
  • Custom fit for make and model listed.
  • Wires are precut to exact specifications
  • Bolt-on performance
  • Conductor core features DuPont Kevlar material for increased tensile strength
  • Durable outer sleeve is a proprietary compound for resistance to high heat or abrasion
  • Stainless steel terminals feature dual crimp tabs to grip wire conductor and outer jacket separately
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Mallory – Distributor Wiring Harness (Part No.29349)

Distributor Wiring Harness

from

$34.49
3-wire for ignition box.

Product Features:
  • Service Part
  • Makes Connections Quick And Easy
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MSD Ignition – Crank Trigger Kit, Big Block Ford (Part No.8644)

Crank Trigger Kit, Big Block Ford

from

$614.99
Most crank triggers have a wheel, with steel studs sticking out, bolted to the harmonic balancer. As the crankshaft turns, the studs pass by a stationary magnetic pick-up, triggering the ignition. This pick-up can be triggered by other bolts, debris, or even vibrations which will cause a loss of power or engine damage. The MSD Flying Magnet Crank Trigger uses four magnets secured in the aluminum trigger wheel that pass by a stationary non-magnetic pick-up to trigger the ignition. This “flying magnet” design produces accurate trigger signals and the non-magnetic pick-up cannot be falsely triggered.

Product Features:
  • Absolutely the most accurate way to trigger the ignition.
  • The non-magnetic pickup cannot be false triggered.
  • Powerful magnets are embedded in a billet aluminum trigger wheel.
  • Kits feature special brackets and mounting hardware for a variety of engines.
  • Fits 429/460 Big Block Ford.
  • Does not fit Cleveland blocks.
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Mallory – Promaster Classic Series; Ignition Coil (Part No.29440)

Promaster Classic Series; Ignition Coil

from

$204.99
The Mallory Promaster Classic series ignition coil is designed to meet today’s specialized ignition requirements. This coil features a faster rise time and increased spark duration (compared to stock) to increase performance. It has a glass-filled polyester case and oil-filled construction to ensure a long life and no energy loss from arcing. This coil also offers excellent wire retention with a spark plug type secondary post, and brass contact terminals.

Product Features:
  • Classic good looks
  • High current / voltage output
  • Spark plug style terminal for excellent coil wire retention
  • Brass contact terminals
  • Mounting bracket included
  • Can be used on inductive and CD ignitions
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In-Demand Performance Engines for 1978 Mercury Cougars

Select from 213 premium Performance Engines parts for your 1978 Mercury Cougar, with prices ranging from $7.99 to $1,095.99.

FEL-PRO Performance – Lower Intake Manifold Gasket Set: 11 Piece Set (Part No.1250)

Lower Intake Manifold Gasket Set: 11 Piece Set

from

$35.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
  • SEALING TECHNOLOGIES — Exclusive sealing innovations and technologies with proprietary materials and unique design features to ensure a superior seal for your repair
  • ENGINEERING EXPERTISE — Parts are designed, reviewed, validated and approved by Fel-Pro engineers through rigorous research and development
  • REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
  • EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
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FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1684)

Engine Valve Cover Gasket Set

from

$50.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Rigid core, molded silicone rubber gaskets provide for ease of installation, and are great for on-again/off-again situations (like setting valve lash).
  • Features high-tech silicone material for long life, a solid steel core for strength and durability, and stainless steel compression limiters to prevent
  • Not intended for use in emission controlled vehicles.
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Competition Cams – Magnum Roller Rocker Arms for Ford; 3/8" Stud, 1.6 Ratio (Part No.1431-16)

Magnum Roller Rocker Arms for Ford; 3/8" Stud, 1.6 Ratio

from

$350.99
These Magnum Roller Rocker Arms for Ford V8 289-351W (Rail Type) 1968-89 applications are the ultimate street rocker. With a 3/8″ stud diameter and 1.6 ratio, they are designed for serious performance enthusiasts. All Magnum Roller Rocker Arms are constructed from 8620 chromemoly steel, which is a superior material that will not flex and assures maximum lift. Their roller tip reduces friction, while stiff design and superior ratio accuracy yield more effective valve lift. With a 15 to 30 horsepower increase over other rocker arms, Magnum Roller Rockers are perfect for performance applications with less than 350 lbs. open spring pressure. Don’t accept inferior products or cheap knock-offs, look for the COMP Cams logo stamped into the underside of every Magnum Rocker.

Product Features:
  • Ultimate street rocker designed for serious performance enthusiasts
  • Constructed from 8620 chromemoly steel, a superior material that will not flex and assures maximum lift
  • Roller tip reduces friction while stiff design and superior ratio accuracy yields more effective valve lift
  • 15 to 30 horsepower increase over stock rocker arms
  • Use in any applications with less than 350 lbs. open spring pressure
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Competition Cams – Magnum 253/253 Hydraulic Flat Cam (Part No.35-331-4)

Magnum 253/253 Hydraulic Flat Cam

from

$297.99
An older member of the COMP Cams grind family, the Magnum series of camshafts offers excellent performance gains over stock without the added wear and tear associated with more aggressive camshafts.

Product Features:
  • Best with aftermarket torque converters and 9.5:1 compression.
  • Great high RPM power.
  • Easy on valve train parts.
  • Can be used with mild ratio rocker arms and traditional performance valve springs.
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FEL-PRO Performance – Cylinder Head Gasket: Steel Core Composite, Without Head Bolts (Part No.1011-1)

Cylinder Head Gasket: Steel Core Composite, Without Head Bolts

from

$52.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • PROPRIETARY COATING – Nonstick anti-friction coating seals small surface imperfections
  • NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
  • SUPERIOR SEAL – Precise embossed Printoseal sealing beads at all vital areas to eliminate leak paths
  • STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
  • DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
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Mr. Gasket – High Performance 180 Degree Thermostat for Increased Flow (Part No.4364)

High Performance 180 Degree Thermostat for Increased Flow

from

$29.99
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:
  • Opens At 180 Degrees
  • Designed to Resist Large Variations of Coolant Pressure at High RPM
  • Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
  • For High Performance Street, Drag Race, and Oval Track
  • Copper & Brass Construction – Resists Corrosion
  • High Flow
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Mr. Gasket – High Performance Thermostat – 160 Degree Brass & Copper (Part No.4363)

High Performance Thermostat - 160 Degree Brass & Copper

from

$29.99
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:
  • Opens at 160 Degrees
  • Designed to Resist Large Variations of Coolant Pressure at High RPM
  • Fully opens at Correct Temperature Consistently Regardless of engine RPM
  • For High Performance Street, Drag Race, and Oval Track
  • Copper & Brass Construction – Resists Corrosion
  • High Flow
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Edelbrock – Intake Manifold Gasket for 1963-1996 Small-Block Fords (Part No.7220)

Intake Manifold Gasket for 1963-1996 Small-Block Fords

from

$30.99


Product Features:
  • Clean Positive Seal
  • Embossed Silicone Bead Surrounding The Port
  • Matched To Manifolds And Cylinder Heads
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Mr. Gasket – Water Neck (Part No.2662)

Water Neck

from

$23.79
Precision die cast, these water necks are first polished to a high luster, then chrome plated. Features an O-ring style seal to prevent water leaks. Comes with O-ring gasket and mounting bolts.

Product Features:
  • Chrome Plated
  • This Is A 45 Degree Neck
  • Comes With O-ring And Bolts
  • Has Small Hose Fitting On It
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Edelbrock – Torker II 302 Intake Manifold Small-Block Ford (Part No.5021)

Torker II 302 Intake Manifold Small-Block Ford

from

$395.99
2500-6500 RPM high-performance street engines. Single-plane low-rise intake good for high RPM. Ideal for applications with limited hood clearance. For top-end HP and adequate throttle response. Available in cast or polished.

Product Features:
  • 2500 to 6500 RPM High Performance Street Engines
  • Single-Plane Low-Rise Intake Good for High RPM
  • Ideal for Applications with Limited Hood Clearance
  • For Top-End HP and Adequate Throttle Response
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Competition Cams – ROCKER ARMS, DIE CAST ALUM SMALL BLOCK FORD 1.6 1 ST (Part No.17043-16)

ROCKER ARMS, DIE CAST ALUM SMALL BLOCK FORD 1.6 1 ST

from

$249.99
The COMP Cams High Energy Die-Cast Aluminum Roller Rocker Arms are new rocker arms from the valve train leader that have been designed for street and moderate race use. They feature a die-cast body created from aluminum with a needle bearing fulcrum and roller tip. The die-cast, larger than stock body offers the strength properties and light weight of aluminum while the specially engineered fulcrum and roller tip decrease friction and lower oil temperatures, thus improving response and horsepower.

Product Features:
  • Cost effective aluminum construction provides superior strength to weight ratio
  • Needle bearing fulcrum and roller tip reduce friction and lower oil temperatures for improved response and horsepower
  • Durable design increases valve lift while withstanding the rigors of moderate race use
  • Die-formed aluminum body is larger than stock, and may require modifications to stock valve covers for clearance.
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Mr. Gasket – High Performance Thermostat (Part No.4365)

High Performance Thermostat

from

$32.49
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:
  • Opens At 195 Degrees
  • Designed to Resist Large Variations of Coolant Pressure at High RPM
  • Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
  • For High Performance Street, Drag Race, and Oval Track
  • Copper & Brass Construction – Resists Corrosion
  • High Flow
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Edelbrock – Performer-Link Adjustable True-Roller Timing Chain Set (Part No.7820)

Performer-Link Adjustable True-Roller Timing Chain Set

from

$74.99


Product Features:
  • Solid Bushing Chain Resists Stretching
  • For Use with Stock or Edelbrock Camshafts
  • Stressproof Steel Crank Gears
  • 3 Keyway Setting Points To Ensure Accurate Timing
  • True Bearing Surface Rolls with the Sprockets
  • For Engine with One-Piece Fuel Pump Eccentric
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Mr. Gasket – Ultra Seal: Harmonic Balancer Bolt/Washer Kit (Part No.7847)

Ultra Seal: Harmonic Balancer Bolt/Washer Kit

from

$45.49
Mr. Gasket Harmonic Balancer Bolt for Ford V8 except 351C. Fits 221,260,289,302,351W small block Windsor engines, 332,352,360,390,406,410,427,428 FEs, and 429,460 385 series big blocks. 5/8-18 x 2 inch long heat treated black oxide coated Grade 8 alloy steel with a thick parallel ground washer to provide accurate, uniform torque.

Product Features:
  • Heat treated black oxide coated Grade 8 alloy steel
  • Thick parallel ground washer provides more accurate, uniform torque
  • Hex Prevents Socket Slippage
  • Accurate And Uniform Torque
  • Black Plated Finish
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Edelbrock – Performer 289 Intake Manifold for Small-Block Ford (Part No.2121)

Performer 289 Intake Manifold for Small-Block Ford

from

$314.99


Product Features:
  • For Idle to 5500 RPM Street-Driven Performance
  • Dual-Plane Low-Rise Intake w/180 deg. Firing Order
  • Patented Runner Design Ensures Broad Torque Curve
  • Excellent Throttle Response and Mid-Range Power
  • 50-State Street Legal
  • Available in Multiple Finishes
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Competition Cams – High Energy 6.881" Long, 5/16" Diameter Pushrod – Set of 16 (Part No.7831-16)

High Energy 6.881" Long, 5/16" Diameter Pushrod - Set of 16

from

$66.99
High Energy Pushrods from COMP Cams are an affordable, high quality solution when building street rods, RVs and daily drivers. High Energy Pushrods have a durable one-piece construction that meets or exceeds all OE pushrod specifications and fit perfectly with High Energy and Magnum Rocker Arms.

Product Features:
  • 5/16″ diameter, 6.881″ length for Small Block Ford 255 and 302, ’65-up with Flat Tappet Cam
  • Best choice when building street rods, RVs or daily drivers
  • Meet or exceed all OE pushrod specifications
  • Mate perfectly with High Energy and Magnum Rockers
  • Durable one-piece construction
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Edelbrock – Front Timing Cover Gasket Set #6991 For Small-Block Ford, With Front Seal (Part No.6991)

Front Timing Cover Gasket Set #6991 For Small-Block Ford, With Front Seal

from

$30.99
Available in kits including front cover gasket, crankshaft seal, fuel pump and water pump gasket or including cover gasket and front seal.

Product Features:
  • Timing Cover Gasket And Oil Seal Kit
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FEL-PRO Performance – PERFORMANCE OIL PAN GASKET SET (Part No.1811)

PERFORMANCE OIL PAN GASKET SET

from

$30.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Felcoid/Plus gaskets have a fiber sheet core and a latex rubber coating to eliminate potential leakage paths. The core material resists crushing and splitting, while providing excellent blowout resistance.
  • With steel core to provide ultimate excellent blowout resistance.
  • Not intended for use in emission controlled vehicles.
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FEL-PRO Performance – Lower Intake Manifold Gasket Set: 7 Piece Set (Part No.1240)

Lower Intake Manifold Gasket Set: 7 Piece Set

from

$39.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Fel-Pro performance intake manifold gaskets have been tested with virtually all aftermarket cylinder head and intake manifold combinations.
  • Performance intake manifold gaskets designed without a metal core, to allow engine builders to trim the gasket for exact fit on modified ports.
  • 1970-82; w/2 Bbl. Cylinder heads
  • Printoseal elastomeric sealing beads to provide extra sealing strength around the intake port.
  • Not intended for use in emission controlled vehicles.
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Mr. Gasket – Rear Main Seal Gasket (Part No.1963)

Rear Main Seal Gasket

from

$49.99
This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It also provides for an upgrade for that leaky rope style seal and is a direct replacement for a rubber main seal. It’s also injection molded for a precise fit.

Product Features:
  • Repairs That Leaky Rear Main Sail
  • Silicone Rubber to Withstand Extreme Engine Oil Temperatures
  • Upgrade for Rope Seal Equipped Cars or Direct Replacement for Rubber Main Seal
  • Injection Molded for Precise Fit
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FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1614)

Engine Valve Cover Gasket Set

from

$24.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Die cut silicone rubber gaskets conform to out-of-flat covers
  • Great for on-again/off-again situations
  • Not intended for use in emission controlled vehicles.
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Competition Cams – Valve Seals, Umbrella 11/32" 1 St (Part No.502-16)

Valve Seals, Umbrella 11/32" 1 St

from

$230.99
COMP Cams offers a complete line of valve stem seals, from the umbrella seals to the positive-stop Teflon seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The umbrella seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop Teflon seal is used. The umbrella seals require no machining, but with the Teflon seal it is necessary to disassemble the heads and machine the top of the guide with a special .530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don’t forget the valve seals.

Product Features:
  • Work with stock guides and 11/32″ valve stem diameter
  • Valve stem oil seals keep unwanted oil from entering the combustion chamber
  • Several different types of valve seals are offered
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Competition Cams – VALVE SEALS, 11/32" TEFLON 1 ST (Part No.503-16)

VALVE SEALS, 11/32" TEFLON 1 ST

from

$223.99
COMP Cams offers a complete line of valve stem seals, from the umbrella seals to the positive-stop Teflon seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The umbrella seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop Teflon seal is used. The umbrella seals require no machining, but with the Teflon seal it is necessary to disassemble the heads and machine the top of the guide with a special .530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don’t forget the valve seals.

Product Features:
  • Work with .530″ guides and 11/32″ valve stem diameter
  • Valve stem oil seals keep unwanted oil from entering the combustion chamber
  • Several different types of valve seals are offered
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FEL-PRO Performance – Cylinder Head Gasket: Steel Core Composite, Without Head Bolts (Part No.1013)

Cylinder Head Gasket: Steel Core Composite, Without Head Bolts

from

$59.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • PROPRIETARY COATING – Nonstick anti-friction coating seals small surface imperfections
  • NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
  • SUPERIOR SEAL – Precise embossed Printoseal sealing beads at all vital areas to eliminate leak paths
  • STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
  • DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
See More

Most Sold 1978 Mercury Cougar Performance Exhaust Products

Explore our best-selling Mercury parts for the 1978 Cougar among 7 OEM and aftermarket options starting from $28.99.

Mr. Gasket – Exhaust Gasket Set (Part No.253)

Exhaust Gasket Set

from

$34.99
Manufactured from high-temperature composite exhaust material. Provides maximum torque retention to eliminate gasket failure. Can be trimmed if necessary for modified port applications. Precision die cut for an excellent fit. For OE replacement, high-performance street, drag race and oval track.

Product Features:
  • High-Temperature Exhaust Material
  • Withstands Extreme Exhaust Heat
  • Excellent Sealing Durability And Torque Retention
  • Superior Tensile Strength
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Mr. Gasket – Ultra Seal: Exhaust Gasket Set (Part No.5930)

Ultra Seal: Exhaust Gasket Set

from

$44.49
Manufactured from high-temperature steel core/graphite faced exhaust material. Expanded steel core provides stability and maximum torque retention to eliminate gasket failure. Graphite facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head. Conforms to and seals minor surface irregularities. High recovery material allows header or manifold flange to stay sealed if flange loses clamp-load. Can be trimmed if necessary for modified port applications. For original equipment replacement, high performance street, drag race and oval track use.

Product Features:
  • Withstands Intense Exhaust Heat
  • Graphite-Impregnated Facing
  • Steel Expanded Metal Core
  • Superior Tensile Strength
  • Resists Deteriorating
  • Anti-stick Properties
  • Easy Removal For Disassembly
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FEL-PRO Performance – Exhaust Manifold Gasket Set (Part No.1430)

Exhaust Manifold Gasket Set

from

$28.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Performance exhaust header gasket consisting of a high-density fiber facing material attached to both sides of a perforated steel core.
  • Resists blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets.
  • Anti-stick coating permits motion without damaging the gasket and makes it easier to remove the gasket for future engine service.
  • Slotted bolt holes allow for easier header installation.
  • Not intended for use in emission controlled vehicles.
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Mr. Gasket – Mls Exhaust Gasket (Part No.4825G)

Mls Exhaust Gasket

from

$34.99
Multi-Layered Steel (MLS) exhaust gaskets are designed for extreme cylinder pressures produced by high horsepower high compression turbo-charged, supercharged and nitrous oxide injected engines. Manufactured from three stainless steel layers, they resist corrosion, will not burn through or push out and maintain maximum fastener torque retention. Stress formed inner and outer layer embossments act like springs that rebound under exhaust flange clamp load, creating force to seal extreme exhaust pressures. Total gasket thickness .075 inch. Will not deteriorate from scrubbing action caused by different expansion rates in aluminum and steel materials.

Product Features:
  • Designed for extreme cylinder pressures by high horsepower-high compression turbocharged, supercharged and nitrous oxide injected engines
  • Manufactured from three stainless steel layers, they resist corrosion, will not burn through or push out and maintain maximum fastener torque retention
  • Stress formed inner and outer layer embossments act like springs that rebound under flange clamp load, creating force to seal extreme pressures
  • Will not deteriorate from scrubbing action caused by different expansion rates in aluminum and steel materials
  • Total gasket thickness .075 inch
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FEL-PRO Performance – Perforated Steel Core with Anti-Stick Coating Exhaust Manifold Gasket Set (Part No.1467)

Perforated Steel Core with Anti-Stick Coating Exhaust Manifold Gasket Set

from

$45.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Performance exhaust header gasket consisting of a high-density fiber facing material attached to both sides of a perforated steel core.
  • Resists blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets.
  • Anti-stick coating permits motion without damaging the gasket and makes it easier to remove the gasket for future engine service.
  • Slotted bolt holes allow for easier header installation.
  • Not intended for use in emission controlled vehicles.
See More

FEL-PRO Performance – Perforated Steel Core with Anti-Stick Coating Exhaust Manifold Gasket Set (Part No.1416)

Perforated Steel Core with Anti-Stick Coating Exhaust Manifold Gasket Set

from

$39.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Performance exhaust header gasket consisting of a high-density fiber facing material attached to both sides of a perforated steel core.
  • Resists blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets.
  • Anti-stick coating permits motion without damaging the gasket and makes it easier to remove the gasket for future engine service.
  • Slotted bolt holes allow for easier header installation.
  • Not intended for use in emission controlled vehicles.
See More

FEL-PRO Performance – Perforated Steel Core with Anti-Stick Coating Exhaust Manifold Gasket Set (Part No.1468)

Perforated Steel Core with Anti-Stick Coating Exhaust Manifold Gasket Set

from

$45.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Performance exhaust header gasket consisting of a high-density fiber facing material attached to both sides of a perforated steel core.
  • Resists blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets.
  • Anti-stick coating permits motion without damaging the gasket and makes it easier to remove the gasket for future engine service.
  • Slotted bolt holes allow for easier header installation.
  • Not intended for use in emission controlled vehicles.
See More

Top-Rated Performance and Racing Products Brands For Your 1978 Mercury Cougar

Shop for the best-rated brands offering Performance and Racing Products and other products for your 1978 Mercury Cougars. Below you’ll find some of our best rated Performance and Racing Products from B & M, FEL-PRO Performance, and MSD Ignition, and more. Performance and Racing Products from these brands that fit a 1978 Cougar start at just $28.99 and are rated as high as 4.3 stars. OEM and aftermarket Performance and Racing Products don’t get more top quality, durable, and affordable than from the brands below.

Popular B & M 1978 Mercury Cougar Performance and Racing Products

When it comes to maintaining or upgrading your 1978 Mercury Cougar, using quality Performance and Racing Products is essential to ensure durability and a perfect fit. B & M ticks all of those boxes. We offer a wide selection of B & M Performance and Racing Products, specifically designed for the 1978 Mercury Cougar. With over 3 B & M brand Performance and Racing Products in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $349.99, with an average price of just $420.66. Plus, with over 3 customer reviews and an average rating of 4.3 stars, you can trust that our B & M Performance and Racing Products will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.
Automatic Shifter, Sport Shifter
from $371.99
(1)
Automatic Shifter, Sport Shifter
“This is a sweetly made product with that hotrod look and feel.This shifter was easy to install and a knock out to drive.No down falls as far as I’m aw”
Automatic Shifter - Megashifter - Universal
from $539.99
(1)
Automatic Shifter – Megashifter – Universal
“its was pretty easy to install if u have any type of knowlegde of cars it should not be difficult at all and the shifting is awesome just be careful w”
Automatic Shifter, StarShifter
from $349.99
(1)
Automatic Shifter, StarShifter
“while I was looking this shifter over and found it wouldn’t work for my application, I found it to be as beautiful as the B&M shifter I had in my othe”

Popular FEL-PRO Performance 1978 Mercury Cougar Performance and Racing Products

FEL-PRO Performance auto parts is one of the highest quality Performance and Racing Product brands in the market. Any 1978 Mercury Cougar owner should feel confident when installing genuine FEL-PRO Performance parts in their vehicle. To ensure the best fit and performance for your 1978 Cougar, Advance Auto Parts carries a full inventory of 3 FEL-PRO Performance Performance and Racing Products. Plus you will be keeping your Mercury in peak condition while saving money because prices on these FEL-PRO Performance Performance and Racing Products range from $28.99 to $50.99, plus, with more than 6 customer reviews and an impressive 4.2 stars average rating, you can be confident the Fram Performance and Racing Products below will deliver on both quality and value.
Exhaust Manifold Gasket Set
from $28.99
(1)
Exhaust Manifold Gasket Set
“Works good no leaks on headers”
Lower Intake Manifold Gasket Set: 11 Piece Set
from $35.99
(4)
Lower Intake Manifold Gasket Set: 11 Piece Set
“Great overall intake gasket!!”
Engine Valve Cover Gasket Set
from $50.99
(1)
Engine Valve Cover Gasket Set
“good”

FAQs for 1978 Mercury Cougar Performance and Racing Products

Which Performance and Racing Products are best-sellers for 1978 Mercury Cougars?

Out of 286 Performance and Racing Products that fit 1978 Mercury Cougars, the following parts are the top sellers:

What’s the price range for 1978 Mercury Cougar Performance and Racing Products?

Performance and Racing Product prices for the 1978 Mercury Cougar start at $5.99 and go up to $1,095.99 for the most premium parts.

What’s the average price of a Performance and Racing Product for a 1978 Mercury Cougar?

The average price for Performance and Racing Products for the 1978 Mercury Cougar is $244.33. Keep in mind the variety of part types within our Performance and Racing Product category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Performance and Racing Products for other Mercury Cougar model years?

Yes, we currently carry Performance and Racing Products for 33 model years of Mercury Cougars between 1967 and 2002. Performance and Racing Products are bought most frequently for the following model years: 2002, 2001, 2000, 1999, 1997, 1996, 1995, 1994, and 1993.

What are the cheapest Performance and Racing Products for my 1978 Mercury Cougar?

The cheapest 1978 Mercury Cougar Performance and Racing Products we carry in stock are:

What are the top-rated Performance and Racing Products that fit the 1978 Mercury Cougar?

Out of 598 reviews by customers, our 1978 Mercury Cougar Performance and Racing Products have an average customer rating of . These are some of the highest-rated Performance and Racing Product types for the 1978 Mercury Cougar and their top-rated products:

What types of Performance and Racing Products do you sell for my 1978 Mercury Cougar?

As of 6/2/26, these are some of the most in-demand types of Performance and Racing Products for a 1978 Mercury Cougar:

Can I get help with 1978 Mercury Cougar Performance and Racing Product orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Mercury Performance and Racing Products and more.

What is your return policy for Mercury Cougar Performance and Racing Products?

Advance Auto Parts keeps returns simple. For new Mercury Cougar Performance and Racing Products and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.