1966 AMC Marlin Performance Engines

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Keep Your 1966 AMC Marlin 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 AMC Marlin looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Engine Coolant Thermostats, Performance Engine Rocker Arms, and Performance Engine Camshafts. 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 Competition Cams. For example, Competition Cams Performance Engines start at just $33.99 with an average 4.2 star rating. With over 65 reviews and a solid 4 star average, you can shop with confidence knowing other AMC Marlin owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1966 AMC Marlin Performance Engine at Advance Auto Parts is around $136.73, with a range that starts at $7.99 and goes up to $1,079.00. With 24 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like High Performance Thermostat, Set of 8 Hardened Lash Caps with 3/8" Valve Stem, .190" Head Height, and Hardened Lash Cap with 3/8" Valve Stem, .190" Head Height start at just $8.99 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 AMC Marlin in peak condition, inside and out.

Find Your Specific 1966 AMC Marlin Performance Engines

Looking for the perfect Performance Engine for your 1966 AMC Marlin? You’re in the right place. Below, you’ll find links to various types of Performance Engines that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Performance Engines, ensuring durability and a precise fit for your AMC Marlin. Whether you’re driving a 1966 model or another popular model year like 1965 and 1967, we’ve got you covered. Purchasing Performance Engines from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Performance Engines that fit your vehicle.

Essential 1966 AMC Marlin Performance Engines

Competition Cams – Xtreme 4X4 206/214 Hydraulic Flat Cam for AMC/Jeep 199-258/4.0L (Part No.68-231-4)

Xtreme 4X4 206/214 Hydraulic Flat Cam for AMC/Jeep 199-258/4.0L

from

$426.99
Xtreme 4X4 206/214 Hydraulic Flat Cam for AMC/Jeep 199-258/4.0L
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Competition Cams – (16) Positive Stop PTFE Valve Seals: for 3/8" Valves and .530" Guides (Part No.505-16)

(16) Positive Stop PTFE Valve Seals: for 3/8" Valves and .530" Guides

from

$33.99
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 3/8″ 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

(1 reviews)
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Competition Cams – Magnum Double Row Timing Set for ’69-’81 AMC 290-401 (Part No.2118)

Magnum Double Row Timing Set for '69-'81 AMC 290-401

from

$129.99
Magnum Double Row Timing Set for ’69-’81 AMC 290-401
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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
See More

(12 reviews)
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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
See More
View Product

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

(20 reviews)
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Edelbrock – Pushrod Set for AMC 343-401 (Part No.9637)

Pushrod Set for AMC 343-401

from

$217.99
Product Features:
  • Case-Hardened Tubing
  • Surface Hardening
  • Welded Ends
  • 0.3125 in. Diameter
  • Use with or without Hardened Steel Guideplates
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Most Popular Performance Engine Coolant Thermostats for 1966 AMC Marlins

Enhance your 1966 AMC Marlin with one of the 3 Performance Engine Coolant Thermostats we have in stock, starting at just $29.99.
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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
See More

(20 reviews)
View Product

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

(12 reviews)
View Product

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
View Product

Best-Selling 1966 AMC Marlin Performance Engine Rocker Arms

Upgrade your Marlin with one of our 5 best-selling Performance Engine Rocker Arms.
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Competition Cams – Ultra Pro Magnum XD Rockers with 1.6 Ratio for Ford 289, 302, 351W with 7/16" Stud (Part No.1832-16)

Ultra Pro Magnum XD Rockers with 1.6 Ratio for Ford 289, 302, 351W with 7/16" Stud

from

$649.99
Machined from 8650 steel with a billet pushrod seat insert, these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. These 1832 rockers feature a 1.6 ratio for use with 7/16″ stud Ford 289, 302 and 351 Windsor.

Product Features:
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Competition Cams – Magnum Roller Rocker Arm Set with 1.6 Ratio for AMC, Ford and Oldsmobile 3/8" Stud (Part No.1442-16)

Magnum Roller Rocker Arm Set with 1.6 Ratio for AMC, Ford and Oldsmobile 3/8" Stud

from

$241.99
Magnum Roller Rocker Arm Set with 1.6 Ratio for AMC, Ford and Oldsmobile 3/8" Stud
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Competition Cams – High Energy Aluminum 1.6 Ratio Roller Rocker Set of 8 AMC, SBF, Olds 7/16" Stud (Part No.17044-8)

High Energy Aluminum 1.6 Ratio Roller Rocker Set of 8 AMC, SBF, Olds 7/16" Stud

from

$148.99
Four decades after its founding, COMP Cams keeps its focus on producing the highest-performing products possible, providing superior customer service and leading the industry in technological development. That commitment continues to resonate with racers, engine builders and enthusiasts worldwide, making COMP Cams the preferred choice for valve train components. COMP Cams is unrivaled thanks to its engineering staff – the largest and most highly trained in the performance aftermarket industry – sophisticated manufacturing processes, expert technicians and real-world testing on the track and street. The company’s integration of research, engineering and development, coupled with the free technical assistance it offers customers, makes it the Absolute Leader in Valve Train Technology.

Product Features:
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Competition Cams – Magnum Roller Rocker Arm with 1.6 Ratio for AMC, Ford and Oldsmobile with 3/8" Stud (Part No.1442-1)

Magnum Roller Rocker Arm with 1.6 Ratio for AMC, Ford and Oldsmobile with 3/8" Stud

from

$31.99
Magnum Roller Rocker Arm with 1.6 Ratio for AMC, Ford and Oldsmobile with 3/8" Stud
View Product

Competition Cams – High Energy Aluminum 1.6 Ratio Roller Rocker for AMC, SBF, Olds with 7/16" Stud (Part No.17044-1)

High Energy Aluminum 1.6 Ratio Roller Rocker for AMC, SBF, Olds with 7/16" Stud

from

$27.99
With a needle bearing fulcrum and a roller tip, our die cast aluminum rockers decrease friction and improve horsepower. This self-aligning 1.6 rocker fits AMC 290-401, Ford 289-351W and Olds 260-455 w/ a 7/16″ stud.

Product Features:
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Top-Quality Performance Engine Camshafts for 1966 AMC Marlins

Choose a high-quality OEM or aftermarket Performance Engine Camshaft for AMC Marlins and enjoy top-notch performance from $426.99.
show more show less

Competition Cams – Xtreme 4X4 206/214 Hydraulic Flat Cam for AMC/Jeep 199-258/4.0L (Part No.68-231-4)

Xtreme 4X4 206/214 Hydraulic Flat Cam for AMC/Jeep 199-258/4.0L

from

$426.99
Xtreme 4X4 206/214 Hydraulic Flat Cam for AMC/Jeep 199-258/4.0L
View Product

Our Top Pick for a 1966 AMC Marlin Performance Engine Valve Stem Seal Set

Invest in a durable Performance Engine Valve Stem Seal Set for your 1966 AMC, knowing you’re getting trusted brands and expert craftsmanship.
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Competition Cams – (16) Positive Stop PTFE Valve Seals: for 3/8" Valves and .530" Guides (Part No.505-16)

(16) Positive Stop PTFE Valve Seals: for 3/8" Valves and .530" Guides

from

$33.99
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 3/8″ 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

(1 reviews)
View Product

Our Performance Engine Timing Sets and Components for 1966 AMC Marlins

Make a smart move for your 1966 AMC Marlin with our Performance Engine Timing Sets and Component for $129.99.
show more show less

Competition Cams – Magnum Double Row Timing Set for ’69-’81 AMC 290-401 (Part No.2118)

Magnum Double Row Timing Set for '69-'81 AMC 290-401

from

$129.99
Magnum Double Row Timing Set for ’69-’81 AMC 290-401
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Top-Rated Performance Engine Brands For Your 1966 AMC Marlin

When it comes to finding the perfect Performance Engine for your 1966 AMC Marlin, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 2 trusted brands. We carry the most popular Performance Engine brands including Competition Cams, and more, all known for their exceptional customer ratings (average brand rating of 4.2 stars) and competitive prices, as low as $33.99. Purchasing a Performance Engine from us here at Advance Auto Parts is a smart move for both you and your 1966 AMC Marlin, providing peace of mind with parts that meet or exceed OEM standards.

Popular Competition Cams 1966 AMC Marlin Performance Engines

If you’re looking for a top-quality Performance Engine for your 1966 AMC Marlin, Advance Auto Parts has exactly what you need with our selection of Competition Cams Performance Engines. We have 1 Competition Cams Performance Engines in stock for this fitment, all known for their durability and precision fit. With prices starting at just $33.99, you’ll find the perfect Performance Engine for your needs and budget. Competition Cams Performance Engines for the 1966 AMC Marlin come highly rated, with over 1 customer reviews and an impressive average rating of 4.2 stars. Choosing a Competition Cams Performance Engine from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
(16) Positive Stop PTFE Valve Seals: for 3/8" Valves and .530" Guides
from $33.99
(1)
(16) Positive Stop PTFE Valve Seals: for 3/8" Valves and .530" Guides
“As good as OEM.”

FAQs for 1966 AMC Marlin Performance Engines

What are the best-selling Performance Engines for 1966 AMC Marlins?

Out of 24 Performance Engines that fit 1966 AMC Marlins, the following parts are the top sellers:

What’s the price range for 1966 AMC Marlin Performance Engines?

The prices of Performance Engines for the 1966 AMC Marlin range from $7.99 up to $1,079.00 for the most premium parts.

What is the average price of a Performance Engine for a 1966 AMC Marlin?

The average price for Performance Engines for the 1966 AMC Marlin is $136.73. 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.

What are the cheapest Performance Engines for my 1966 AMC Marlin?

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

Yes. We stock Performance Engines for 3 other popular 1966 AMC models. Some of the most popular are 1966 Ambassador Performance Engines, 1966 American Performance Engines, 1966 Classic Performance Engines, and 1966 Rogue Performance Engines.

What types of Performance Engines do you sell for my 1966 AMC Marlin?

As of 6/2/26, these are some of the most in-demand types of Performance Engines for a 1966 AMC Marlin:

Can I get help with 1966 AMC Marlin Performance Engine orders?

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

What is your return policy for AMC Marlin Performance Engines?

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

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