1978 Mercury Zephyr Performance Engines

Please Select your Vehicle to See Exact Fit Parts

Keep Your 1978 Mercury Zephyr in Top Shape with Quality Performance Engines

Whether you’re repairing or upgrading your Performance Engine, using high-quality parts is key to keeping your 1978 Mercury Zephyr looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Water Outlets, Performance Engine Intake Manifold Gaskets, and Performance Engine Cylinder Head Gaskets. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Performance Engines from Trusted Brands

Looking for a reliable Performance Engine? We’ve got you covered with options from brands you know and trust like FEL-PRO Performance, Competition Cams, and Edelbrock. For example, FEL-PRO Performance Performance Engines start at just $35.99 with an average 4.2 star rating. Competition Cams and Edelbrock offer similar pricing and quality, backed by strong customer feedback. With over 174 reviews and a solid 4 star average, you can shop with confidence knowing other Mercury Zephyr owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1978 Mercury Zephyr Performance Engine at Advance Auto Parts is around $243.54, with a range that starts at $7.99 and goes up to $1,006.00. With 122 options in stock from 5 trusted brands, finding the right fit is easy. Popular picks like High Performance Thermostat, Intake Manifold Gasket for 1963-1996 Small-Block Fords, and Performer-Link Adjustable True-Roller Timing Chain Set start at just $30.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Performance Engine, don’t forget to check out other key components like Performance Distributors and Performance Fuel Systems. At Advance Auto Parts, we’re here to help you keep your 1978 Mercury Zephyr in peak condition, inside and out.

Essential 1978 Mercury Zephyr Performance Engines

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
See More

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
See More

Competition Cams – Xtreme Energy 224/230 Hydraulic Flat Cam (Part No.31-242-3)

Xtreme Energy 224/230 Hydraulic Flat Cam

from

$267.99
Featuring a quicker valve opening, the Xtreme Energy camshaft profile provides increased responsiveness and more area under the lift curve than older, slower grinds. Designed to increase performance without sacrificing driveability and creature comforts,

Product Features:
  • Excellent performance in street carbureted applications.
  • More vacuum allows an increase in duration for improved performance and assists power brakes.
  • Quicker opening lobe profiles deliver increased responsiveness and more area under the lift curve.
  • Best performance with aftermarket intake manifolds, headers, lower gear ratios etc.
See More

Competition Cams – 10 Degree Steel Retainer for 26120 Beehive Spring (Part No.795-1)

10 Degree Steel Retainer for 26120 Beehive Spring

from

$10.99
10 Degree Steel Retainer for 26120 Beehive Spring

Competition Cams – Xtreme Energy 206/212 Hydraulic Flat Cam and Lifter Kit (Part No.CL31-230-3)

Xtreme Energy 206/212 Hydraulic Flat Cam and Lifter Kit

from

$368.99
Featuring a quicker valve opening, the Xtreme Energy camshaft profile provides increased responsiveness and more area under the lift curve than older, slower grinds. Designed to increase performance without sacrificing driveability and creature comforts.

Product Features:
  • Excellent performance in street carbureted applications.
  • More vacuum allows an increase in duration for improved performance and assists power brakes.
  • Quicker opening lobe profiles deliver increased responsiveness and more area under the lift curve.
  • Best performance with aftermarket intake manifolds, headers, lower gear ratios etc.
See More

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
See More

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
See More

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
See More

FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1613)

Engine Valve Cover Gasket Set

from

$29.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Blue Stripe performance cork-rubber gaskets use cork particles evenly distributed throughout a rubber binder resulting in a compressible gasket without leak paths.
  • Not intended for use in emission controlled vehicles.
See More

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.
See More

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
See More

FEL-PRO Performance – Performance Cylinder Head Gasket (Part No.1035)

Performance Cylinder Head Gasket

from

$82.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions.

Product Features:
  • Fel-Pro Performance head gaskets accommodate the high cylinder pressures and cylinder head movement associated with performance engines.
  • Inserted within a stainless steel armor surrounding each cylinder, wire ring design provides highly concentrated sealing around the combustion chamber.
  • Raises combustion sealing force to roughly three times that of standard head gaskets.
  • Steel wire rings for the greatest combustion seal strength.
  • Not intended for use in emission controlled vehicles.
See More

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
See More

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
See More

B & M – Torque Converter, C4 26 Spline 10.5 BC (Part No.50416)

Torque Converter, C4 26 Spline 10.5 BC

from

$665.99
A higher than stock stall speed as delivered by a B&M Converter will provide several advantages. The high stall converter allows the engine to launch the car at a higher RPM where more torque is available and increased strength. Due to torque converter co

Product Features:
  • Furnace Brazed Impeller
  • Steel Alloy Pump Drive Tube
  • Heavy Duty Needle Bearing
  • Between Stator and Turbine
  • Furnace Brazed Turbine
See More

B & M – Torque Converter, Tork Master 2400 (Part No.50441)

Torque Converter, Tork Master 2400

from

$529.99
A higher than stock stall speed as delivered by a B&M Converter will provide several advantages. The high stall converter allows the engine to launch the car at a higher RPM where more torque is available and increased strength. Due to torque converter co

Product Features:
  • New Precision Pump Drive Tube
  • Pressure Tested
  • Fully Balanced
  • Needle Thrust Bearing
  • New Thrust Washer
See More

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
See More

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
See More

Edelbrock – Performer Intake Manifold Small-Block Ford (Part No.3721)

Performer Intake Manifold Small-Block Ford

from

$414.99


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 if Correct Carburetor Used
See More

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
See More

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
See More

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
See More

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
See More

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
See More

Most Popular Performance Water Outlet for 1978 Mercury Zephyrs

Enhance your 1978 Mercury Zephyr with this popular Performance Water Outlet we have in stock, for $23.79.

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
See More

Best-Selling 1978 Mercury Zephyr Performance Engine Intake Manifold Gaskets

Upgrade your Zephyr with one of our 2 best-selling Performance Engine Intake Manifold Gaskets, earning an average 4.5 stars rating across 5 reviews.

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
See More

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
See More

Top-Quality Performance Engine Cylinder Head Gaskets for 1978 Mercury Zephyrs

Choose a high-quality OEM or aftermarket Performance Engine Cylinder Head Gasket for Mercury Zephyrs and enjoy top-notch performance from $52.99.

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
See More

FEL-PRO Performance – Performance Cylinder Head Gasket (Part No.1035)

Performance Cylinder Head Gasket

from

$82.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions.

Product Features:
  • Fel-Pro Performance head gaskets accommodate the high cylinder pressures and cylinder head movement associated with performance engines.
  • Inserted within a stainless steel armor surrounding each cylinder, wire ring design provides highly concentrated sealing around the combustion chamber.
  • Raises combustion sealing force to roughly three times that of standard head gaskets.
  • Steel wire rings for the greatest combustion seal strength.
  • Not intended for use in emission controlled vehicles.
See More

Top Picks for 1978 Mercury Zephyr Performance Intake Manifolds

Invest in one of our 5 durable Performance Intake Manifolds for your 1978 Mercury, knowing you’re getting trusted brands and expert craftsmanship.

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
See More

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
See More

Edelbrock – Performer 289 Intake Manifold for Small-Block Ford, Polished Finish (Part No.21211)

Performer 289 Intake Manifold for Small-Block Ford, Polished Finish

from

$608.99


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
See More

Edelbrock – RPM Air-Gap Small Block Ford 302 Black Intake Manifold (Part No.75213)

RPM Air-Gap Small Block Ford 302 Black Intake Manifold

from

$605.99
Edelbrock part #75213 RPM Air-Gap intake manifold is designed for street 289 302-347 c.i.d. Ford V8’s. The RPM Air-Gap incorporates the same race-winning technology that’s been used on our Victor Series competition intakes for decades. The Air-Gap design

Product Features:
  • 1500-6500 RPM Range
  • Dual Plane Type-4150 Style Flange
  • 4.3 in. Front Height, 4.9 in. Center Height, 5.5 in. Rear Height
  • Black Powder Coated Finish
  • Made In The USA
See More

Edelbrock – Performer Intake Manifold Small-Block Ford (Part No.3721)

Performer Intake Manifold Small-Block Ford

from

$414.99


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 if Correct Carburetor Used
See More

Top-Rated Performance Engine Coolant Thermostats for 1978 Mercury Zephyrs

Make a smart move for your 1978 Mercury Zephyr with products all priced from $29.99 to $32.49.

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
See More

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
See More

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
See More

Top-Rated Performance Engine Brands For Your 1978 Mercury Zephyr

When it comes to finding the perfect Performance Engine for your 1978 Mercury Zephyr, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 5 trusted brands. We carry the most popular Performance Engine brands including Edelbrock, FEL-PRO Performance, and Competition Cams, and more, all known for their exceptional customer ratings (average brand rating of 4.4 stars) and competitive prices, as low as $30.99. Purchasing a Performance Engine from us here at Advance Auto Parts is a smart move for both you and your 1978 Mercury Zephyr, providing peace of mind with parts that meet or exceed OEM standards.

Popular Edelbrock 1978 Mercury Zephyr Performance Engines

If you’re looking for a top-quality Performance Engine for your 1978 Mercury Zephyr, Advance Auto Parts has exactly what you need with our selection of Edelbrock Performance Engines. We have 1 Edelbrock Performance Engines in stock for this fitment, all known for their durability and precision fit. With prices starting at just $30.99, you’ll find the perfect Performance Engine for your needs and budget. Edelbrock Performance Engines for the 1978 Mercury Zephyr come highly rated, with over 1 customer reviews and an impressive average rating of 4.4 stars. Choosing a Edelbrock Performance Engine from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Intake Manifold Gasket for 1963-1996 Small-Block Fords
from $30.99
(1)
Intake Manifold Gasket for 1963-1996 Small-Block Fords
“Minor fitment corrections to line up with my AFR185 heads and Victor Jr Intake.”

Top-Quality FEL-PRO Performance 1978 Mercury Zephyr Performance Engines

For those in search of a high-quality Performance Engine for their 1978 Mercury Zephyr, Advance Auto Parts offers a great selection of FEL-PRO Performance Performance Engines. With 3 FEL-PRO Performance Performance Engines in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Performance Engines start at just $35.99, with an average price of $46.66, giving you a range of options to suit your budget. Backed by over 7 customer ratings and an average rating of 4.2 stars, FEL-PRO Performance Performance Engines provide both reliability and excellent performance. Choosing a FEL-PRO Performance Performance Engine from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Engine Valve Cover Gasket Set
from $50.99
(1)
Engine Valve Cover Gasket Set
“good”
Lower Intake Manifold Gasket Set: 11 Piece Set
from $35.99
(4)
Lower Intake Manifold Gasket Set: 11 Piece Set
“Great overall intake gasket!!”
Cylinder Head Gasket: Steel Core Composite, Without Head Bolts
from $52.99
(2)
Cylinder Head Gasket: Steel Core Composite, Without Head Bolts
“cometic head gasket is great but prob is dose not seal if the block isn’t mirror finished. many people switch over to felpro and it has worked out gre”

FAQs for 1978 Mercury Zephyr Performance Engines

What are the best-selling Performance Engines for 1978 Mercury Zephyrs?

Out of 122 Performance Engines that fit 1978 Mercury Zephyrs, the following parts are the top sellers:

What’s the price range for 1978 Mercury Zephyr Performance Engines?

The prices of Performance Engines for the 1978 Mercury Zephyr range from $7.99 up to $1,006.00 for the most premium parts.

What is the average price of a Performance Engine for a 1978 Mercury Zephyr?

The average price for Performance Engines for the 1978 Mercury Zephyr is $243.54. Keep in mind the variety of part types within our Performance Engine category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Performance Engines for other Mercury Zephyr model years?

Yes, we carry Performance Engines for 4 model years of Mercury Zephyrs between 1979 and 1983. The following model years are the most popular for Performance Engine purchases: 1983, 1982, 1981, 1980, and 1979.

What are the cheapest Performance Engines for my 1978 Mercury Zephyr?

Does Advance Auto Parts sell Performance Engines for any other 1978 Mercury models?

Yes. We stock Performance Engines for 4 other popular 1978 Mercury models. Some of the most popular are 1978 Cougar Performance Engines, 1978 Grand Marquis Performance Engines, 1978 Marquis Performance Engines, 1978 Monarch Performance Engines, and 1978 Bobcat Performance Engines.

What types of Performance Engines do you sell for my 1978 Mercury Zephyr?

As of 6/2/26, these are some of the most in-demand types of Performance Engines for a 1978 Mercury Zephyr:

Can I get help with 1978 Mercury Zephyr Performance Engine orders?

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

What is your return policy for Mercury Zephyr Performance Engines?

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