1966 Checker Marathon Engine Internals

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Keep Your 1966 Checker Marathon in Top Shape with Quality Engine Internals

Whether you’re repairing or upgrading your Engine Internal, using high-quality parts is key to keeping your 1966 Checker Marathon looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Crankshaft Bolts, Standard Rod Bearing Sets, and Crankshaft Seals. 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 Engine Internals from Trusted Brands

Looking for a reliable Engine Internal? We’ve got you covered with options from brands you know and trust like Sealed Power, Victor Reinz, and Felpro. For example, Sealed Power Engine Internals start at just $6.29 with an average 4.4 star rating. Victor Reinz and Felpro offer similar pricing and quality, backed by strong customer feedback. With over 46 reviews and a solid 4.8 star average, you can shop with confidence knowing other Checker Marathon owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1966 Checker Marathon Engine Internal at Advance Auto Parts is around $58.89, with a range that starts at $4.99 and goes up to $354.99. With 55 options in stock from 4 trusted brands, finding the right fit is easy. Popular picks like Felpro Engine Crankshaft Seal Kit, BS 40013, Sealed Power Engine Connecting Rod Bearing, 2555CP, and Sealed Power Engine Connecting Rod Bearing, 2555A 10 start at just $6.29 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Engine Internal, don’t forget to check out other key components like Engine Gaskets and Seals and Engine Timing Parts. At Advance Auto Parts, we’re here to help you keep your 1966 Checker Marathon in peak condition, inside and out.

Essential 1966 Checker Marathon Engine Internals

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2130CP 10 (Part No.2130CP 10)

Sealed Power Engine Connecting Rod Bearing, 2130CP 10

from

$7.39
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 1995CPA 10 (Part No.1995CPA 10)

Sealed Power Engine Connecting Rod Bearing, 1995CPA 10

from

$24.49
Sealed Power® Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2555CP 30 (Part No.2555CP 30)

Sealed Power Engine Connecting Rod Bearing, 2555CP 30

from

$6.29
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 60 (Part No.8-2555A 60)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 60

from

$151.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555CP 10 (Part No.8-2555CP 10)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555CP 10

from

$79.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2020CP 20 (Part No.8-2020CP 20)

Sealed Power Engine Connecting Rod Bearing Set, 8-2020CP 20

from

$57.99
Sealed Power® Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 4663M 40 (Part No.4663M 40)

Sealed Power Engine Crankshaft Main Bearing Set, 4663M 40

from

$58.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 5085M (Part No.5085M)

Sealed Power Engine Crankshaft Main Bearing Set, 5085M

from

$97.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 4663M 30 (Part No.4663M 30)

Sealed Power Engine Crankshaft Main Bearing Set, 4663M 30

from

$62.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

ARP Auto Racing – ARP Auto Racing For Use With Chevy Gen Iii/Ls Series Small Block/ Gmpp Lsx Block, Hex Head, 234-5608 (Part No.234-5608)

ARP Auto Racing For Use With Chevy Gen Iii/Ls Series Small Block/ Gmpp Lsx Block, Hex Head, 234-5608

from

$354.99
There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel ground washers and high quality nuts. Some applications have provisions for mounting wind age trays and have specially designed standoff studs with serrated lock nuts to position the wind age tray and lock it securely in place. The studs are manufactured from 8740 chrome moly steel, heat treated in-house to 200,000 Pounds Per Square Inch tensile strength, and precision J-form threads rolled after heat treat to create a fastener that has threads 1000 Percent stronger than others.
See More

ARP Auto Racing – "ARP Auto Racing For Use With Chevy Small Block, 5/8"" Socket Size, 3/4"" – 16 Thread Size, 134-2501" (Part No.134-2501)

"ARP Auto Racing For Use With Chevy Small Block, 5/8"" Socket Size, 3/4"" - 16 Thread Size, 134-2501"

from

$39.99
As the crankshaft flexes and twists, the balancer absorbs incredible amounts of kinetic energy. To ensure that the balancer is locked in position, ARP has developed these ultra strong 200,000 PSI bolts that let you exert maximum clamping force. Special features include 1/4 Inch thick, wide area washer and an extra tall 12 point head that accepts a deep socket and eliminates the worry of stripping the head.
See More

ARP Auto Racing – ARP Auto Racing For Use With Chevy Small Block Large Journal, 4 Bolt Main, Hex Head, Chrome Moly, 134-5202 (Part No.134-5202)

ARP Auto Racing For Use With Chevy Small Block Large Journal, 4 Bolt Main, Hex Head, Chrome Moly, 134-5202

from

$85.99
Far superior to any other main bolt kit offered for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders. Forged from 8740 chrome moly, all bolts feature generous under head radius and rolled threads for the utmost reliability. The threads are rolled after heat treating, which makes them about 1000 Percent longer fatigue life than most main bolts, which are threaded prior to heat treating. Available in the popular High Performance Series, which, at a nominal rating of 180,000 PSI, is a premium replacement for OEM fasteners, or the 200,000 PSI nominal rated Pro Series, application specific main bolts with reduced wrenching head and are designed for use in competition applications. Parallel ground, hardened washers are included with each kit.
See More

National – National Engine Crankshaft Seal, 5118 (Part No.5118)

National Engine Crankshaft Seal, 5118

from

$42.49
National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
See More

Felpro – Felpro Engine Crankshaft Seal Kit, BS 40013 (Part No.BS 40013)

Felpro Engine Crankshaft Seal Kit, BS 40013

from

$26.99
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.
See More

Victor Reinz – Victor Reinz Engine Crankshaft Seal Kit, 19-10147-01 (Part No.19-10147-01)

Victor Reinz Engine Crankshaft Seal Kit, 19-10147-01

from

$19.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
See More

Victor Reinz – Victor Reinz Engine Crankshaft Seal Kit, 19-10116-01 (Part No.19-10116-01)

Victor Reinz Engine Crankshaft Seal Kit, 19-10116-01

from

$28.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 10 (Part No.8-2555A 10)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 10

from

$165.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 20 (Part No.8-2555A 20)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 20

from

$82.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 10X2 (Part No.8-2555A 10X2)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 10X2

from

$78.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2020CP (Part No.8-2020CP)

Sealed Power Engine Connecting Rod Bearing Set, 8-2020CP

from

$61.99
Sealed Power® Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2130CP 1 (Part No.2130CP 1)

Sealed Power Engine Connecting Rod Bearing, 2130CP 1

from

$6.79
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2020CP (Part No.2020CP)

Sealed Power Engine Connecting Rod Bearing, 2020CP

from

$7.69
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2555CP 1 (Part No.2555CP 1)

Sealed Power Engine Connecting Rod Bearing, 2555CP 1

from

$6.59
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2555A 1 (Part No.2555A 1)

Sealed Power Engine Connecting Rod Bearing, 2555A 1

from

$7.59
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 5085MA (Part No.5085MA)

Sealed Power Engine Crankshaft Main Bearing Set, 5085MA

from

$64.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 4124MA (Part No.4124MA)

Sealed Power Engine Crankshaft Main Bearing Set, 4124MA

from

$73.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Most Popular Crankshaft Bolts for 1966 Checker Marathons

Enhance your 1966 Checker Marathon with one of the 4 Crankshaft Bolts we have in stock, starting at just $39.99.

ARP Auto Racing – "ARP Auto Racing For Use With Chevy Small Block, 5/8"" Socket Size, 3/4"" – 16 Thread Size, 134-2501" (Part No.134-2501)

"ARP Auto Racing For Use With Chevy Small Block, 5/8"" Socket Size, 3/4"" - 16 Thread Size, 134-2501"

from

$39.99
As the crankshaft flexes and twists, the balancer absorbs incredible amounts of kinetic energy. To ensure that the balancer is locked in position, ARP has developed these ultra strong 200,000 PSI bolts that let you exert maximum clamping force. Special features include 1/4 Inch thick, wide area washer and an extra tall 12 point head that accepts a deep socket and eliminates the worry of stripping the head.
See More

ARP Auto Racing – ARP Auto Racing For Use With Chevy Small Block Large Journal, 4 Bolt Main, Hex Head, Chrome Moly, 134-5202 (Part No.134-5202)

ARP Auto Racing For Use With Chevy Small Block Large Journal, 4 Bolt Main, Hex Head, Chrome Moly, 134-5202

from

$85.99
Far superior to any other main bolt kit offered for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders. Forged from 8740 chrome moly, all bolts feature generous under head radius and rolled threads for the utmost reliability. The threads are rolled after heat treating, which makes them about 1000 Percent longer fatigue life than most main bolts, which are threaded prior to heat treating. Available in the popular High Performance Series, which, at a nominal rating of 180,000 PSI, is a premium replacement for OEM fasteners, or the 200,000 PSI nominal rated Pro Series, application specific main bolts with reduced wrenching head and are designed for use in competition applications. Parallel ground, hardened washers are included with each kit.
See More

ARP Auto Racing – ARP Auto Racing For Use With Chevy Gen Iii/Ls Series Small Block/ Gmpp Lsx Block, Hex Head, 234-5608 (Part No.234-5608)

ARP Auto Racing For Use With Chevy Gen Iii/Ls Series Small Block/ Gmpp Lsx Block, Hex Head, 234-5608

from

$354.99
There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel ground washers and high quality nuts. Some applications have provisions for mounting wind age trays and have specially designed standoff studs with serrated lock nuts to position the wind age tray and lock it securely in place. The studs are manufactured from 8740 chrome moly steel, heat treated in-house to 200,000 Pounds Per Square Inch tensile strength, and precision J-form threads rolled after heat treat to create a fastener that has threads 1000 Percent stronger than others.
See More

ARP Auto Racing – "ARP Auto Racing For Use With Chevy Small Block, 13/16"" Socket Size, 2.470"" Under Head L, 234-2501" (Part No.234-2501)

"ARP Auto Racing For Use With Chevy Small Block, 13/16"" Socket Size, 2.470"" Under Head L, 234-2501"

from

$46.99
As the crankshaft flexes and twists, the balancer absorbs incredible amounts of kinetic energy. To ensure that the balancer is locked in position, ARP has developed these ultra strong 200,000 Pounds Per Square Inch bolts that let you exert maximum clamping force. Special features comes with 1/4 Inch thick, wide area washer and an extra tall 12 point head that accepts a deep socket and eliminates the worry of stripping the head.
See More

Best-Selling 1966 Checker Marathon Standard Rod Bearing Sets

Upgrade your Marathon with one of our 10 best-selling Standard Rod Bearing Sets, earning an average 4.5 stars rating across 5 reviews.

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555CP (Part No.8-2555CP)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555CP

from

$95.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A (Part No.8-2555A)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A

from

$83.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 1 (Part No.8-2555A 1)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 1

from

$85.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 10 (Part No.8-2555A 10)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 10

from

$165.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 20 (Part No.8-2555A 20)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 20

from

$82.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2020CP (Part No.8-2020CP)

Sealed Power Engine Connecting Rod Bearing Set, 8-2020CP

from

$61.99
Sealed Power® Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 10X2 (Part No.8-2555A 10X2)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 10X2

from

$78.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 30 (Part No.8-2555A 30)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A 30

from

$159.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 8-2555A X2 (Part No.8-2555A X2)

Sealed Power Engine Connecting Rod Bearing Set, 8-2555A X2

from

$58.99
Sealed Power® parts provide innovative designs, use leading-edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing Set, 6-2020CP (Part No.6-2020CP)

Sealed Power Engine Connecting Rod Bearing Set, 6-2020CP

from

$48.49
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Top-Quality Crankshaft Seals for 1966 Checker Marathons

Choose a high-quality OEM or aftermarket Crankshaft Seal for Checker Marathons and enjoy top-notch performance from $25.99.

Victor Reinz – Victor Reinz Engine Crankshaft Seal Kit, 19-10012-01 (Part No.19-10012-01)

Victor Reinz Engine Crankshaft Seal Kit, 19-10012-01

from

$25.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
See More

Felpro – Felpro Engine Crankshaft Seal Kit, BS 40013 (Part No.BS 40013)

Felpro Engine Crankshaft Seal Kit, BS 40013

from

$26.99
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.
See More

Victor Reinz – Victor Reinz Engine Crankshaft Seal Kit, 19-10116-01 (Part No.19-10116-01)

Victor Reinz Engine Crankshaft Seal Kit, 19-10116-01

from

$28.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
See More

Top Picks for 1966 Checker Marathon Oversized Main Bearings

Invest in one of our 10 durable Oversized Main Bearings for your 1966 Checker, knowing you’re getting trusted brands and expert craftsmanship.

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 994M 10 (Part No.994M 10)

Sealed Power Engine Crankshaft Main Bearing Set, 994M 10

from

$66.99
Sealed Power® Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 7329MA 10 (Part No.7329MA 10)

Sealed Power Engine Crankshaft Main Bearing Set, 7329MA 10

from

$92.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 4124MA 10 (Part No.4124MA 10)

Sealed Power Engine Crankshaft Main Bearing Set, 4124MA 10

from

$65.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 4124MA 20 (Part No.4124MA 20)

Sealed Power Engine Crankshaft Main Bearing Set, 4124MA 20

from

$73.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 4124MA 30 (Part No.4124MA 30)

Sealed Power Engine Crankshaft Main Bearing Set, 4124MA 30

from

$67.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 4124MA 40 (Part No.4124MA 40)

Sealed Power Engine Crankshaft Main Bearing Set, 4124MA 40

from

$67.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 994M 20 (Part No.994M 20)

Sealed Power Engine Crankshaft Main Bearing Set, 994M 20

from

$66.99
Sealed Power® Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 994M 30 (Part No.994M 30)

Sealed Power Engine Crankshaft Main Bearing Set, 994M 30

from

$64.99
Sealed Power® Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 994M 1 (Part No.994M 1)

Sealed Power Engine Crankshaft Main Bearing Set, 994M 1

from

$61.99
Sealed Power® Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.
See More

Sealed Power – Sealed Power Engine Crankshaft Main Bearing Set, 6688M 20 (Part No.6688M 20)

Sealed Power Engine Crankshaft Main Bearing Set, 6688M 20

from

$53.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Top-Rated Standard Individual Rod Bearings for 1966 Checker Marathons

Make a smart move for your 1966 Checker Marathon with products all priced from $4.99 to $8.89.

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2555CP (Part No.2555CP)

Sealed Power Engine Connecting Rod Bearing, 2555CP

from

$8.89
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2555A 1 (Part No.2555A 1)

Sealed Power Engine Connecting Rod Bearing, 2555A 1

from

$7.59
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2555A 10 (Part No.2555A 10)

Sealed Power Engine Connecting Rod Bearing, 2555A 10

from

$6.29
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2555A (Part No.2555A)

Sealed Power Engine Connecting Rod Bearing, 2555A

from

$6.89
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2555CP 1 (Part No.2555CP 1)

Sealed Power Engine Connecting Rod Bearing, 2555CP 1

from

$6.59
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2020CP 10 (Part No.2020CP 10)

Sealed Power Engine Connecting Rod Bearing, 2020CP 10

from

$6.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2020CP (Part No.2020CP)

Sealed Power Engine Connecting Rod Bearing, 2020CP

from

$7.69
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Sealed Power Engine Connecting Rod Bearing, 2555CP 40 (Part No.2555CP 40)

Sealed Power Engine Connecting Rod Bearing, 2555CP 40

from

$4.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
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Top-Rated Engine Internal Brands For Your 1966 Checker Marathon

When it comes to finding the perfect Engine Internal for your 1966 Checker Marathon, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 4 trusted brands. We carry the most popular Engine Internal brands including Victor Reinz, Felpro, and Sealed Power, and more, all known for their exceptional customer ratings (average brand rating of 4.7 stars) and competitive prices, as low as $6.29. Purchasing a Engine Internal from us here at Advance Auto Parts is a smart move for both you and your 1966 Checker Marathon, providing peace of mind with parts that meet or exceed OEM standards.

Popular Victor Reinz 1966 Checker Marathon Engine Internals

If you’re looking for a top-quality Engine Internal for your 1966 Checker Marathon, Advance Auto Parts has exactly what you need with our selection of Victor Reinz Engine Internals. We have 1 Victor Reinz Engine Internals in stock for this fitment, all known for their durability and precision fit. With prices starting at just $25.99, you’ll find the perfect Engine Internal for your needs and budget. Victor Reinz Engine Internals for the 1966 Checker Marathon come highly rated, with over 1 customer reviews and an impressive average rating of 4.7 stars. Choosing a Victor Reinz Engine Internal from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Victor Reinz Engine Crankshaft Seal Kit, 19-10012-01
from $25.99
(1)
Victor Reinz Engine Crankshaft Seal Kit, 19-10012-01
“fit perfect…”

Top-Quality Felpro 1966 Checker Marathon Engine Internals

For those in search of a high-quality Engine Internal for their 1966 Checker Marathon, Advance Auto Parts offers a great selection of Felpro Engine Internals. With 1 Felpro Engine Internals in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Engine Internals start at just $26.99, giving you a range of options to suit your budget. Backed by over 4 customer ratings and an average rating of 4.6 stars, Felpro Engine Internals provide both reliability and excellent performance. Choosing a Felpro Engine Internal from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Felpro Engine Crankshaft Seal Kit, BS 40013
from $26.99
(4)
Felpro Engine Crankshaft Seal Kit, BS 40013
“Quick and easy transaction”

FAQs for 1966 Checker Marathon Engine Internals

What are the best-selling Engine Internals for 1966 Checker Marathons?

Out of 55 Engine Internals that fit 1966 Checker Marathons, the following parts are the top sellers:

What’s the price range for 1966 Checker Marathon Engine Internals?

The prices of Engine Internals for the 1966 Checker Marathon range from $4.99 up to $354.99 for the most premium parts.

What is the average price of an Engine Internal for a 1966 Checker Marathon?

The average price for Engine Internals for the 1966 Checker Marathon is $58.89. Keep in mind the variety of part types within our Engine Internal category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Internals for other Checker Marathon model years?

Yes, we carry Engine Internals for 20 model years of Checker Marathons between 1961 and 1982. The following model years are the most popular for Engine Internal purchases: 1982, 1981, 1980, 1979, 1978, 1977, 1976, 1975, and 1974.

What are the cheapest Engine Internals for my 1966 Checker Marathon?

The cheapest 1966 Checker Marathon Engine Internals we carry are:

What are the top-rated Engine Internals that fit the 1966 Checker Marathon?

Based on 46 reviews by customers, our 1966 Checker Marathon Engine Internals have an average customer rating of 4.8 stars. These are the highest-rated categories of Engine Internals for the 1966 Checker Marathon and their top-rated products:

What types of Engine Internals do you sell for my 1966 Checker Marathon?

As of 8/2/26, these are some of the most in-demand types of Engine Internals for a 1966 Checker Marathon:

Can I get help with 1966 Checker Marathon Engine Internal orders?

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

What is your return policy for Checker Marathon Engine Internals?

Advance Auto Parts keeps returns simple. For new Checker Marathon Engine Internals and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.