Rear Main Seals

Perhaps nothing will ruin a gearhead’s day faster than a dark oily spot on the garage floor from a leaking rear main seal. And since replacing a rear main seal isn’t...

Perhaps nothing will ruin a gearhead’s day faster than a dark oily spot on the garage floor from a leaking rear main seal. And since replacing a rear main seal isn’t typically the easiest job, make sure your rear main seal repair goes right the first time by getting quality rear main seals from Summit Racing.

Whether you need a rear main seal for a Jeep 4.0L, the ubiquitous “SBC” small block Chevy 350, GM LS, Ford Windsor, Mopar LA, or whatever’s under your hood, you’ll find engine rear main seals for virtually every popular motor, often with one- and two-piece rear main seal options.

An engine rear main seal is a critical...

An engine rear main seal is a critical seal that ensures oil from the motor doesn’t seep past the crankshaft, into the transmission or onto your garage floor. Rear main seals often dry out with age, become brittle, and crack—particularly on cars and trucks that don’t get driven often. But if you notice a leak or drip from your engine’s rear main seal, don’t immediately think a rear main seal replacement is necessary. Try driving around for a week or two. There’s a chance your seal has dried out from sitting too long, and running your engine regularly for a little while may recoat it with oil, saturate the material again, and restore the seal.

Additionally, make absolutely sure your leak is from the rear main seal in the first place—it’s not uncommon for weeping valve cover gaskets or distributor seals to be misdiagnosed as rear main seal leaks. (And those are much, much easier to fix.) So, confirm that your leak is coming off the rear main first before starting down the road to a rear main seal repair.

For a lot of older engines though, their original rear main seals will often need to be replaced as they age. And a rear main seal repair can be a cumbersome, time-consuming job, so it makes sense to replace your engine’s rear main seal with a good replacement seal to ensure you don’t have to repeat the job anytime soon.

If your SBC Chevy, 351 Ford, Jeep 4.0L, or GM LS has a rear main seal that’s starting to mark its territory, replace it with a quality replacement rear main seal from Summit Racing. See all your rear main seal options here.

Individual Parts

Part Groups

Results 1 - 25 of 959

Mahle Original Rear Main Seals JV1657

Rear Main Seals, Original, One-piece, Viton®, Chevy, Small Block LS, Each

Part Number: MAH-JV1657

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2918

Rear Main Seal, 2-Piece, Viton®, Chevy, Big Block, Each

Part Number: FEL-2918

4.43 out of 5 stars ( 23 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2900

Rear Main Seal, 2-Piece, Silicone, Chevy, Small Block V8/L6/V6, Each

Part Number: FEL-2900

4.9 out of 5 stars ( 41 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2912

Rear Main Seal, 2-Piece, Fluoroelastomer, Chevy, Small Block V8/L6/V6, Each

Part Number: FEL-2912

4.87 out of 5 stars ( 30 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2919

Rear Main Seal, 1-Piece, Silicone, Chevy, Small Block V8/V6, Each

Part Number: FEL-2919

4.83 out of 5 stars ( 12 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2904

Rear Main Seal, 2-Piece, Silicone, Buick V6, Chevy Big Block, Each

Part Number: FEL-2904

4.47 out of 5 stars ( 19 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Chevrolet Performance Rear Main Seals 89060436

Rear Main Seal, 1 Piece, Buick, Chevy, GMC, Pontiac, Saab, LS Engine, Each

Part Number: NAL-89060436

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2909

Rear Main Seal, 2-Piece, Fluoroelastomer, Chevy, Small Block, Each

Part Number: FEL-2909

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

SCE AccuSeal Pro Rear Main Seals 22804

SCE AccuSeal Pro Rear Main Seals 22804

Rear Main Seal, Viton®, Each

Part Number: SCE-22804

3.8 out of 5 stars ( 5 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2921

Rear Main Seal, 1-Piece, Fluoroelastomer, Ford, 351W/351SVO, Each

Part Number: FEL-2921

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2920

Rear Main Seal, 1-Piece, Viton®, Chevy, Big Block, Each

Part Number: FEL-2920

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2947

Rear Main Seal, 2-Piece, Fluoroelastomer, Mopar, Big Block/Hemi, Each

Part Number: FEL-2947

4.08 out of 5 stars ( 12 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Ford Performance Parts Rear Main Seals M-6701-B302

Rear Main Seal, 1-Piece, Viton®, Ford 1983-2001, 5.0L/302, Each

Part Number: FMS-M-6701-B302

4.2 out of 5 stars ( 20 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Rear Main Seals BS 40620

Rear Main Seal, 1-Piece, Rubber, Ford, Small Block, Each

Part Number: FEL-BS40620

5.0 out of 5 stars ( 15 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2948

Rear Main Seal, 2-Piece, Viton®, Ford, Big Block 385 Series, Each

Part Number: FEL-2948

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2901

Rear Main Seal, 2-Piece, Silicone, Ford, Small Block, Each

Part Number: FEL-2901

3.79 out of 5 stars ( 19 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Rear Main Seals BS 30138

Rear Main Seal, 2-Piece, Rubber, Ford, 332-428, FE, Each

Part Number: FEL-BS30138

5.0 out of 5 stars ( 6 )

Estimated Ship Date: May 20, 2025 if ordered today

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Estimated Ship Date: May 20, 2025 if ordered today

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We recommend these similar substitute parts:

Mahle Original Rear Main Seals JV707P

5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 5/12/2025

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Fel-Pro Rear Main Seals BS 40520

Rear Main Seal, 1-Piece, Rubber, Chevy, Small Block, Each

Part Number: FEL-BS40520

4.0 out of 5 stars ( 8 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Rear Main Seals BS 11829-1

Rear Main Seal, 2-Piece, Rubber, Chevy, Small Block, Each

Part Number: FEL-BS118291

4.56 out of 5 stars ( 16 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Performance Rear Main Bearing Seals 2941

Rear Main Seal, 1-Piece, PTFE, Ford, Small Block, Each

Part Number: FEL-2941

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Rear Main Seals BS 40656

Rear Main Seal, 1-Piece, PTFE, Cadillac, Chevy, GMC, Hummer, Oldsmobile, V6, V8, Each

Part Number: FEL-BS40656

4.5 out of 5 stars ( 8 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Mahle Original Rear Main Seals JV1635

Rear Main Seals, Original, One-piece, PTFE Rubber, Ford, Each

Part Number: MAH-JV1635

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Rear Main Seals BS 40096-1

Rear Main Seal, 2-Piece, Rubber, Chevy, Each

Part Number: FEL-BS400961

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Timken Rear Main Seals 100085

Rear Main Seal, 1-Piece, PTFE, Each

Part Number: TMK-100085

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

Fel-Pro Rear Main Seals BS 30136

Rear Main Seal, 2-Piece, Rubber, Ford, L4/V6/V8, Each

Part Number: FEL-BS30136

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 5/12/2025

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Estimated Ship Date: Monday 5/12/2025

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