1966 Pontiac GTO Performance Engines

Keep Your 1966 Pontiac GTO 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 1966 Pontiac GTO looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Engine Valve Cover Gasket Sets, Performance Engine Intake Manifold Gaskets, and Performance Engine Coolant Thermostats. 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 B & M, Competition Cams, and Edelbrock. For example, B & M Performance Engines start at just $373.99 with an average 4.1 star rating. Competition Cams and Edelbrock offer similar pricing and quality, backed by strong customer feedback. With over 35 reviews and a solid 5 star average, you can shop with confidence knowing other Pontiac GTO owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1966 Pontiac GTO Performance Engine at Advance Auto Parts is around $294.48, with a range that starts at $7.99 and goes up to $1,365.99. With 97 options in stock from 5 trusted brands, finding the right fit is easy. Popular picks like High Performance Thermostat, Set of 16 O-Ring Valve Seals for Stock Guide Size, 11/32" Valve Stem, and Lower Intake Manifold Gasket Set: 12 Piece Set start at just $31.99 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 1966 Pontiac GTO in peak condition, inside and out.

Essential 1966 Pontiac GTO Performance Engines

Edelbrock – Performer Intake Manifold for 1965-79 Pontiac 326-455 Non-EGR, Black Finish (Part No.21563)

Performer Intake Manifold for 1965-79 Pontiac 326-455 Non-EGR, Black Finish

from

$573.99
Edelbrock part #21563 Performer Pontiac intake manifold is designed for 1965-79 Pontiac 326-455 c.i.d. V8’s (except Ram Air V and 265/301 V8’s). Provides great throttle response for performance you can feel. Ideal for cars, 4x4s, tow vehicles, RVs and boa

Product Features:
  • Idle-5500 RPM Range
  • Dual Plane Type-4150 Style Flange
  • 5.5 in. Front Height, 6.05 in. Center Height, 6.6 in. Rear Height
  • Black Powder Coated Finish
  • Non-EGR
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Mr. Gasket – High Performance Thermostat (Part No.4365)

High Performance Thermostat

from

$31.99
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 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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FEL-PRO Performance – PERFORMANCE OIL PAN GASKET SET (Part No.1814)

PERFORMANCE OIL PAN GASKET SET

from

$30.49
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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Competition Cams – VALVE SPRING KIT, FOR LS 1.310" BEEHIVE 1 KT (Part No.26918CS-KIT)

VALVE SPRING KIT, FOR LS 1.310" BEEHIVE 1 KT

from

$528.99
This Beehive Valve Spring Kit for LS engines is designed for hydraulic roller cams and includes carefully matched Beehive Springs, steel retainers, locks, seals and spring seats. With a .625″ maximum lift, these Beehive Valve Springs deliver increased valve train stability and a much lighter valve train. This is achieved with less spring pressure for better valve control and reduced weight of both the spring and retainer. The unique Beehive shape handles valve train stress more efficiently to eliminate damaging harmonics and increases high RPM horsepower and durability. The oval/multi-arc wire shape places the maximum area of the wire at the point of highest stress to handle valve train stress more efficiently and allow better heat dissipation for longer life.Kit Includes:26918-16 Beehive Valve Springs774-16 Steel Retainers623-16 7° Steel Valve Locks511-16 Valve Seals4705-16 Spring Seats

Product Features:
  • Kit includes part #26918-16 Beehive valve springs and matching steel retainers, 7° valve locks, valve seals and spring seats
  • Kits designed for hydraulic roller cams
  • .625″ maximum lift springs
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FEL-PRO Performance – Lower Intake Manifold Gasket Set: 12 Piece Set (Part No.1233)

Lower Intake Manifold Gasket Set: 12 Piece Set

from

$34.99
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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Edelbrock – RPM-Link Adjustable True-Roller Timing Chain Set (Part No.7343)

RPM-Link Adjustable True-Roller Timing Chain Set

from

$203.99
Edelbrock part #7343 RPM-Link adjustable true-roller timing chain Set now, you can dial-in your camshaft with ease with our RPM-Link Roller Timing Chain Set. RPM-Link timing chain bolt onto your engine just like any other timing chain set, so there’s no m

Product Features:
  • Keyway Adjustable
  • Single Roller Timing Chain Type
  • Induction Hardened Billet Steel Material
  • No Machining Required
  • No Special Offset Bushings Needed For Installation
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Edelbrock – Replacement Water Pump Cartridge for 1997-04 GM LS1/LS6 Gen III (Part No.8897)

Replacement Water Pump Cartridge for 1997-04 GM LS1/LS6 Gen III

from

$244.99
Edelbrock #8897 Water Pump gm gen III ls1 & gen iv ls, replacement insert ideal to prevent overheating in street rods and street machines, as well as in tow rigs and motorhomes. Using state-of-the-art racing technology, Edelbrock has designed these “super

Product Features:
  • Standard Impeller Rotation
  • Replacement Insert
  • Service Part
  • For Part Number 8896
  • Satin Finish
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Competition Cams – Set of 16 O-Ring Valve Seals for Stock Guide Size, 11/32" Valve Stem (Part No.501-16)

Set of 16 O-Ring Valve Seals for Stock Guide Size, 11/32" Valve Stem

from

$223.99
VALVE SEALS, O-RING 11/32″ 1 ST
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Competition Cams – Reduced Travel OE-Style Hydraulic Roller Lifter for ’87+ SBC, LT/LS and V6 (Part No.875-1)

Reduced Travel OE-Style Hydraulic Roller Lifter for '87+ SBC, LT/LS and V6

from

$39.99
Reduced Travel OE-Style Hydraulic Roller Lifter for ’87+ SBC, LT/LS and V6

Mr. Gasket – Gskt Valve Cover (Part No.576)

Gskt Valve Cover

from

$27.99
Mr. Gasket Performance Valve Cover Gaskets are high-density cork/rubber blend gaskets that use evenly sized cork particles distributed evenly throughout the rubber binder. The result is a compressible valve cover gasket without leak paths. These gaskets create a positive seal by controlled swelling of the gasket material when exposed to hot engine oil. Provides excellent flange sealing and durability. For original equipment replacement, high performance street, drag race and oval track use.

Product Features:
  • Manufactured from high-density cork/rubber blend gasket material
  • Provides excellent sealing and durability
  • For OE replacement, high performance street, drag race and oval track use
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FEL-PRO Performance – Performance Valve Cover Gasket Set (Part No.1623)

Performance Valve Cover Gasket Set

from

$23.29
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.
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B & M – Torque Converter, Holeshot 2000 (Part No.70417)

Torque Converter, Holeshot 2000

from

$625.99
The Holeshot Converter is a very good choice for the typical street machine that is looking for better launch capability and more strength. With a furnace brazed turbine, new turbine hub and dual pattern drive lugs on some GM Holeshots.

Product Features:
  • Furnace Brazed Impeller
  • Steel Alloy Pump Drive Tube
  • Heavy Duty Needle Bearing
  • Between Stator and Turbine
  • Furnace Brazed Turbine
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B & M – Tork Master 2400 (Part No.20404)

Tork Master 2400

from

$373.99
Torque Converter – Tork Master 2400 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) APPLICATION: Tork Master 2400 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) The Tork Master is B&M’s lowest cost performance torque converter. The Tork Master is an excellent all-around performance street converter. The best value priced street converters available, Tork Master converters come with a new precision pump drive tube and all are pressure tested and fully balanced. The Tork Master torque converter is not recommended for big block or supercharged applications. New alloy steel pump drive tube. Needle thrust bearing when factory equipped. New thrust washer between turbine and cover when required. Due to torque converter core availability, the actual converter size may vary but performance functionality will be as advertised.

Product Features:
  • New Precision Pump Drive Tube
  • Pressure Tested
  • Fully Balanced
  • Needle Thrust Bearing
  • New Thrust Washer
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Edelbrock – Performer Pontiac Cylinder Head 72cc Hydraulic Flat Tapped Camshaft (Part No.60579)

Performer Pontiac Cylinder Head 72cc Hydraulic Flat Tapped Camshaft

from

$1365.99
Product Features:
  • For Professional Cylinder Head Porter
  • 72cc Chamber Size
  • As-Cast Casting Has Small Ports And Chambers
  • Max Valve Size is 2.11 Int and 1.66 Exh
  • 14-Degree Valve Angle
  • Enough Wall Thickness For CNC Machining
  • Seats and Manganese-Bronze Guides Included
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Edelbrock – Performer Series Retainer (Qty 16) (Part No.9724)

Performer Series Retainer (Qty 16)

from

$106.99
Product Features:
  • Use W/ Valve Springs Part #5822, 5882, 5896, 5872, 5867, 5812, 5857
  • Set of 16
  • 1.50 in. Outside Diameter
  • Steel Material
  • Black Oxide Finish
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Competition Cams – 7 Degree Steel Retainer Set of 16 for GM GEN III w/ 26915/26918 Beehive Springs (Part No.774-16)

7 Degree Steel Retainer Set of 16 for GM GEN III w/ 26915/26918 Beehive Springs

from

$85.99
This 7° steel retainer for GM Gen III applications with #26915 or #26918 Beehive Valve Springs is precision machined from 4140 chromemoly steel and finished in black oxide. This precision retainer is specifically designed for positive location when combined with COMP Cams high-quality valve springs.

Product Features:
  • 7° angle retainers for 1.055″ diameter valve springs, stock diameter valve stems
  • O.D. – 1.030″, Step 1 – .640″
  • Precision machined from 4140 chromemoly steel and finished in black oxide
  • Designed for positive location when combined with COMP Cams high-quality valve springs
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Competition Cams – XFI XE-R 238/240 Hydraulic Roller Cam (Part No.54-448-11)

XFI XE-R 238/240 Hydraulic Roller Cam

from

$541.99
Designed to take advantage of the GM LS engine’s larger camshaft journal diameter, the XFI RPM camshaft line takes Xtreme Energy technology to deliver excellent power.

Product Features:
  • Designed with Xtreme Energy technology to provide excellent power with the LS engine’s enhanced cylinder head design and high RPM potential.
  • Takes advantage of the LS engine’s larger journal diameter, base circle and 1.7+ rocker arm ratio.
  • Provides outstanding low RPM torque with increased stability.
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Competition Cams – Mutha’ Thumpr 235/249 Hydraulic Flat Cam (Part No.12-601-4)

Mutha' Thumpr 235/249 Hydraulic Flat Cam

from

$350.99
HYDRAULIC – Mutha’ Thumpr: High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.

Product Features:
  • HYDRAULIC – Mutha’ Thumpr: High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.
  • 287/305 Advertised Duration, 235/249 Duration @ .050″, .489″/.476″ Lift, 107 Lobe Separation
  • Valve spring upgrade required
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Competition Cams – Xtreme Energy 212/218 Hydraulic Flat Cam (Part No.51-221-4)

Xtreme Energy 212/218 Hydraulic Flat Cam

from

$298.99
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.
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Edelbrock – Performer-Plus Camshaft Kit for Pontiac 350-403 V8 (Part No.2157)

Performer-Plus Camshaft Kit for Pontiac 350-403 V8

from

$376.99


Product Features:
  • Designed for Optimum Torque and Acceleration
  • Maximum Performance From Idle through Mid-Range
  • Matched to Edelbrock Performer Intakes
  • Includes Hydraulic Lifters and Assembly Lube
  • Major Improvement in Throttle Response and Torque
  • Use For Daily Drivers/Trucks/Vans/RVs/4x4s
  • Take The Guesswork Out Of Camshaft Selection
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Competition Cams – Xtreme Energy 240/246 Hydraulic Flat Cam and Lifter Kit (Part No.CL51-225-4)

Xtreme Energy 240/246 Hydraulic Flat Cam and Lifter Kit

from

$416.99
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.
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Competition Cams – Magnum 224/224 Hydraulic Flat Cam and Lifter Kit (Part No.CL51-233-4)

Magnum 224/224 Hydraulic Flat Cam and Lifter Kit

from

$403.99
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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Competition Cams – High Energy/Marine 218/218 Hydraulic Flat Cam/Lifter Kit (Part No.CL12-210-2)

High Energy/Marine 218/218 Hydraulic Flat Cam/Lifter Kit

from

$898.99
SMALL BLOCK CHEVY HYDRAULIC CAM AND LIFTER KIT – High Energy: Good street performance with stock converter, choppy idle. OR High Energy Marine: Biggest cam for inboard/outboard. Good for ski, economy and light performance.

Product Features:
  • Cam and lifter kit for Small Block Chevy engines
  • CL-Kit includes cam, lifters, assembly lube, instructions and decals
  • HYDRAULIC – High Energy: Good street performance with stock converter, choppy idle. OR High Energy Marine: Biggest cam for inboard/outboard. Good for ski, economy and light performance.
  • 268/268 Advertised Duration, 218/218 Duration @ .050″, .454″/.454″ Lift, 110 Lobe Separation
  • Valve spring upgrade required
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FEL-PRO Performance – Performance Cylinder Head Gasket (Part No.1016)

Performance Cylinder Head Gasket

from

$54.99
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

Most Popular Performance Engine Valve Cover Gasket Sets for 1966 Pontiac GTOs

Enhance your 1966 Pontiac GTO with one of the 3 Performance Engine Valve Cover Gasket Sets we have in stock, starting at just $23.29.

Mr. Gasket – Gskt Valve Cover (Part No.576)

Gskt Valve Cover

from

$27.99
Mr. Gasket Performance Valve Cover Gaskets are high-density cork/rubber blend gaskets that use evenly sized cork particles distributed evenly throughout the rubber binder. The result is a compressible valve cover gasket without leak paths. These gaskets create a positive seal by controlled swelling of the gasket material when exposed to hot engine oil. Provides excellent flange sealing and durability. For original equipment replacement, high performance street, drag race and oval track use.

Product Features:
  • Manufactured from high-density cork/rubber blend gasket material
  • Provides excellent sealing and durability
  • For OE replacement, high performance street, drag race and oval track use
See More

FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1622)

Engine Valve Cover Gasket Set

from

$34.99
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

FEL-PRO Performance – Performance Valve Cover Gasket Set (Part No.1623)

Performance Valve Cover Gasket Set

from

$23.29
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

Best-Selling 1966 Pontiac GTO Performance Engine Intake Manifold Gaskets

Upgrade your GTO with one of our 2 best-selling Performance Engine Intake Manifold Gaskets.

FEL-PRO Performance – Lower Intake Manifold Gasket Set: 12 Piece Set (Part No.1233)

Lower Intake Manifold Gasket Set: 12 Piece Set

from

$34.99
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

Mr. Gasket – Intake Gasket (Part No.502G)

Intake Gasket

from

$34.99
Mr. Gasket Performance Intake Gaskets are manufactured from cellulose/nitrile composition gasket material. They provide excellent sealing and durability. Can be trimmed if necessary for modified port applications. Complete with manifold end seals and distributor gasket (where applicable). For original equipment replacement, high performance street, drag race and oval track.

Product Features:
  • Manufactured from cellulose/nitrile composition gasket material
  • Provides excellent sealing and durability
  • Can be trimmed if necessary for modified port applications
  • Complete with manifold end seals and distributor gasket where applicable
  • For OE replacement, high performance street, drag race and oval track use
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Top-Quality Performance Engine Coolant Thermostats for 1966 Pontiac GTOs

Choose a high-quality OEM or aftermarket Performance Engine Coolant Thermostat for Pontiac GTOs and enjoy top-notch performance from $29.49.

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
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Mr. Gasket – High Performance Thermostat – 160 Degree Brass & Copper (Part No.4363)

High Performance Thermostat - 160 Degree Brass & Copper

from

$29.49
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 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

$31.99
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 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

Our Top Pick for a 1966 Pontiac GTO Performance Engine Cylinder Head Gasket

Invest in a durable Performance Engine Cylinder Head Gasket for your 1966 Pontiac, knowing you’re getting trusted brands and expert craftsmanship.

FEL-PRO Performance – Performance Cylinder Head Gasket (Part No.1016)

Performance Cylinder Head Gasket

from

$54.99
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

Our Performance Intake Manifolds for 1966 Pontiac GTOs

Make a smart move for your 1966 Pontiac GTO with our Performance Intake Manifold for $573.99.

Edelbrock – Performer Intake Manifold for 1965-79 Pontiac 326-455 Non-EGR, Black Finish (Part No.21563)

Performer Intake Manifold for 1965-79 Pontiac 326-455 Non-EGR, Black Finish

from

$573.99
Edelbrock part #21563 Performer Pontiac intake manifold is designed for 1965-79 Pontiac 326-455 c.i.d. V8’s (except Ram Air V and 265/301 V8’s). Provides great throttle response for performance you can feel. Ideal for cars, 4x4s, tow vehicles, RVs and boa

Product Features:
  • Idle-5500 RPM Range
  • Dual Plane Type-4150 Style Flange
  • 5.5 in. Front Height, 6.05 in. Center Height, 6.6 in. Rear Height
  • Black Powder Coated Finish
  • Non-EGR
See More

Top-Rated Performance Engine Brands For Your 1966 Pontiac GTO

When it comes to finding the perfect Performance Engine for your 1966 Pontiac GTO, 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, B & M, 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 $223.99. Purchasing a Performance Engine from us here at Advance Auto Parts is a smart move for both you and your 1966 Pontiac GTO, providing peace of mind with parts that meet or exceed OEM standards.

Popular Edelbrock 1966 Pontiac GTO Performance Engines

If you’re looking for a top-quality Performance Engine for your 1966 Pontiac GTO, 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 $405.99, you’ll find the perfect Performance Engine for your needs and budget. Edelbrock Performance Engines for the 1966 Pontiac GTO 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.
Water Pump for Pontiac, Standard Rotation in Black Finish
from $405.99
(1)
Water Pump for Pontiac, Standard Rotation in Black Finish
“It is a great product”

Top-Quality B & M 1966 Pontiac GTO Performance Engines

For those in search of a high-quality Performance Engine for their 1966 Pontiac GTO, Advance Auto Parts offers a great selection of B & M Performance Engines. With 1 B & M 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 $373.99, giving you a range of options to suit your budget. Backed by over 1 customer ratings and an average rating of 4.1 stars, B & M Performance Engines provide both reliability and excellent performance. Choosing a B & M Performance Engine from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Tork Master 2400
from $373.99
(1)
Tork Master 2400
“The B&M 2400 stall converter was a great choice for my application. It works well on the street and track, increased performance by leaps and bounds. ”

FAQs for 1966 Pontiac GTO Performance Engines

What are the best-selling Performance Engines for 1966 Pontiac GTOs?

Out of 97 Performance Engines that fit 1966 Pontiac GTOs, the following parts are the top sellers:

What’s the price range for 1966 Pontiac GTO Performance Engines?

The prices of Performance Engines for the 1966 Pontiac GTO range from $7.99 up to $1,365.99 for the most premium parts.

What is the average price of a Performance Engine for a 1966 Pontiac GTO?

The average price for Performance Engines for the 1966 Pontiac GTO is $294.48. 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 Pontiac GTO model years?

Yes, we carry Performance Engines for 11 model years of Pontiac GTOs between 1964 and 2006. The following model years are the most popular for Performance Engine purchases: 2006, 2005, 2004, 1973, 1972, 1971, 1970, 1969, and 1968.

What are the cheapest Performance Engines for my 1966 Pontiac GTO?

Does Advance Auto Parts sell Performance Engines for any other 1966 Pontiac models?

Yes. We stock Performance Engines for 5 other popular 1966 Pontiac models. Some of the most popular are 1966 Grand Prix Performance Engines, 1966 Bonneville Performance Engines, 1966 LeMans Performance Engines, 1966 Catalina Performance Engines, and 1966 Tempest Performance Engines.

What are the top-rated Performance Engines that fit the 1966 Pontiac GTO?

The one 1966 Pontiac GTO Performance Engine we have in stock is the Flat 1 Piece Guide Plate for AMC 290-401/Pontiac V8 with 5/16" Pushrod 7/16" Stud. It costs $7.99.

What types of Performance Engines do you sell for my 1966 Pontiac GTO?

As of 11/2/25, these are some of the most in-demand types of Performance Engines for a 1966 Pontiac GTO:

Can I get help with 1966 Pontiac GTO Performance Engine orders?

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

What is your return policy for Pontiac GTO Performance Engines?

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