Engine Blocks & Parts | Summit Racing

Allstar Performance Small Block Rear Main Seal Adapters ALL26126

Seal Adapter, Billet Aluminum, 1 to 2-Piece Style, Chevy, Small Block Gen I, Kit

Part Number: AAF-ALL26126

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Monday 12/15/2025

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Estimated Ship Date: Monday 12/15/2025

Allstar Performance Small Block Rear Main Seal Adapters ALL26125

Seal Adapter, Billet Aluminum, 1 to 2-Piece Style, Chevy, Small Block Gen I, Kit

Part Number: AAF-ALL26125

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Monday 12/15/2025

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Estimated Ship Date: Monday 12/15/2025

ACDelco GM Genuine Parts Replacement Bolts 12556127

Bolt, GM Genuine Parts Replacement Bolt, Hex Head Flange, M8 x 1.25, 0.900 in. Underhead Length, Grade 10.9, Steel, Gray, Each

Part Number: ADO-12556127

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/15/2025

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Estimated Ship Date: Monday 12/15/2025

Canton Racing SBC Rear Main Seal Adapters 21-850

Canton Racing SBC Rear Main Seal Adapters 21-850

Seal Adapter, Billet Aluminum, 1 to 2-Piece Style, Chevy, Small Block Gen I, Kit

Part Number: CTR-21-850

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Chevrolet Performance Bowtie Big Block Chevy Cast Iron Engine Blocks 19212191

Engine Block, Bowtie, Cast Iron, 4.494 in. Bore, 9.800 in. Deck, Chevy, Big Block Gen V, Each

Part Number: NAL-19212191

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Apr 13, 2026 if ordered today

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Estimated Ship Date: Apr 13, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Chevrolet Performance 454 C.I.D. Bare Engine Blocks 19170538

4.75 out of 5 stars ( 9 )

Estimated Ship Date: Monday 12/15/2025

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S&S Cycle 97 in. Big Bore Kits 910-0205

Top End Engine Kit, 97 in. Big Bore, Black Wrinkle Finish, Forged Pistons, Gaskets, Harley-Davidson®, Kit

Part Number: SSY-910-0205

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

S&S Cycle Super Stock Alternator-Style Crankcases 31-0005

CASES STK EVOLUTION 92-99B.T.

Part Number: SSY-31-0005

Not Yet Reviewed

Estimated Ship Date: Monday 12/15/2025

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Estimated Ship Date: Monday 12/15/2025

S&S Cycle 110 in. Power Packages 330-0668

Top End Engine Kit, 110 in Power Package, Black Wrinkle Finish, 585 Easy Start Cams, Harley-Davidson®, Kit

Part Number: SSY-330-0668

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

HardDrive Cylinders 820-51549

Cylinder Head, TC 88/96 3.75" STD BRE CYLINDR

Part Number: HDD-820-51549

Not Yet Reviewed

Estimated Ship Date: Jan 6, 2026 if ordered today

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Estimated Ship Date: Jan 6, 2026 if ordered today

Twin Power Cylinders 495614

Cylinder, Aluminum, Steel Liner, 3.500 in. Bore, Black Finish, Harley-Davidson®, Each

Part Number: TWP-MT75747B

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

PRW Billet Steel Main Caps 1745401

Main Caps, Billet Steel, 4-Bolt, Straight, Chevy, Big Block, Set of 4

Part Number: PQX-1745401

Not Yet Reviewed

Estimated Ship Date: Monday 12/15/2025

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Estimated Ship Date: Monday 12/15/2025

Howards Cams Extreme Billet Main Caps H350C

Main Caps, Billet Steel, 3-Center, Straight Outer Bolts, 4-Bolt, Chevy, Small Block, Set of 3

Part Number: HRS-H350C

Not Yet Reviewed

Estimated Ship Date: Monday 12/15/2025

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Estimated Ship Date: Monday 12/15/2025