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Summit Racing SpeedCard - learn how to get 10% back up to $100

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Powersports Top End Engine Kits

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Results 1 - 25 of 78

S&S Cycle 124 in. Hot Set-Up Cylinder Kits 910-0338

S&S Cycle 124 in. Hot Set-Up Cylinder Kits 910-0338

S&S Cycle 124 in. Hot Set-Up Cylinder Kits 910-0338

ENGINE PERFORMANCE, 124" 4-1/8" BORE, CYLNDR ST 4-1/8" BR 124"

Part Number: SSY-910-0338

Not Yet Reviewed

Estimated Ship Date: Dec 14, 2026 if ordered today

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Estimated Ship Date: Dec 14, 2026 if ordered today

S&S Cycle 883 to 1200cc Hooligan Cylinder Kits 910-0700

S&S Cycle 883 to 1200cc Hooligan Cylinder Kits 910-0700

S&S Cycle 883 to 1200cc Hooligan Cylinder Kits 910-0700

S&S Cycle 00-21 Sportster Models 883cc to 1200cc Hooligan Kit - Silver

Part Number: SSY-910-0700

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

S&S Cycle 4 in. Sidewinder Big Bore Kits 910-0650

S&S Cycle 4 in. Sidewinder Big Bore Kits 910-0650

S&S Cycle 4 in. Sidewinder Big Bore Kits 910-0650

ENGINE CYLINDERS, 07-UP TWINCAM (INC 06 DYNA), 4" CYLINDER KIT SIL

Part Number: SSY-910-0650

Not Yet Reviewed

Estimated Ship Date: Dec 14, 2026 if ordered today

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Estimated Ship Date: Dec 14, 2026 if ordered today

S&S Cycle 1200cc to 1250cc Hooligan Cylinder Kits 910-0701

S&S Cycle 1200cc to 1250cc Hooligan Cylinder Kits 910-0701

S&S Cycle 1200cc to 1250cc Hooligan Cylinder Kits 910-0701

S&S Cycle 00-21 Sportster Models 1200cc to 1250cc Hooligan Kit - Wrinkle Black

Part Number: SSY-910-0701

Not Yet Reviewed

Estimated Ship Date: Dec 15, 2026 if ordered today

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Estimated Ship Date: Dec 15, 2026 if ordered today

S&S Cycle 4 in. Sidewinder Big Bore Kits 910-0651

S&S Cycle 4 in. Sidewinder Big Bore Kits 910-0651

S&S Cycle 4 in. Sidewinder Big Bore Kits 910-0651

Top End Engine Kit, Sidewinder Big Bore, Black Wrinkle Finish, 4 in., Forged Piston, Harley-Davidson®, Kit

Part Number: SSY-910-0651

Not Yet Reviewed

Estimated Ship Date: Dec 16, 2026 if ordered today

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Estimated Ship Date: Dec 16, 2026 if ordered today

S&S Cycle 4 in. Sidewinder Big Bore Kits 910-0646

S&S Cycle 4 in. Sidewinder Big Bore Kits 910-0646

S&S Cycle 4 in. Sidewinder Big Bore Kits 910-0646

ENGINE CYLINDERS, 99-06 TWIMCAM (EXC 06 DYNA), 4" CYLINDER KIT BLK

Part Number: SSY-910-0646

Not Yet Reviewed

Estimated Ship Date: Dec 16, 2026 if ordered today

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Estimated Ship Date: Dec 16, 2026 if ordered today

S&S Cycle V124 Cylinder Kits 910-0229

S&S Cycle V124 Cylinder Kits 910-0229

S&S Cycle V124 Cylinder Kits 910-0229

S&S Cycle 84-99 BT 4 1/8in Bore Cylinder & Pistons Kit For S&S V124 Engine - Natural

Part Number: SSY-910-0229

Not Yet Reviewed

Estimated Ship Date: Dec 4, 2026 if ordered today

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Estimated Ship Date: Dec 4, 2026 if ordered today

S&S Cycle M8 128 in. Big Bore Kits 910-0733A

S&S Cycle M8 128 in. Big Bore Kits 910-0733A

S&S Cycle M8 128 in. Big Bore Kits 910-0733A

2017+ M8 4.2520in Bore x 4.5in Stroke 117 to 128 Big Bore Kit

Part Number: SSY-910-0733A

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle 3 7/16 in. Bore Cylinder Kits 91-9017

S&S Cycle 3 7/16 in. Bore Cylinder Kits 91-9017

S&S Cycle 3 7/16 in. Bore Cylinder Kits 91-9017

S&S Cycle 66-84 3-7/16in x Up To 4-3/4in Stroke Cylinder Kit - Gloss Black

Part Number: SSY-91-9017

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle 117 in. Big Bore Kits 910-0318

S&S Cycle 117 in. Big Bore Kits 910-0318

S&S Cycle 117 in. Big Bore Kits 910-0318

07-16 BT 117in Low Compression 4-1/8in Big Bore Kit - Wrinkle Black

Part Number: SSY-910-0318

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle M8 132 in. Big Bore Kits 910-0846A

S&S Cycle M8 132 in. Big Bore Kits 910-0846A

S&S Cycle M8 132 in. Big Bore Kits 910-0846A

2017+ M8 Models 4.320in Bore 4.500in Stroke Cylinder Kit - Wrinkle Black w/o Highlight

Part Number: SSY-910-0846A

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle 1200cc to 1250cc Hooligan Cylinder Kits 910-0702

S&S Cycle 1200cc to 1250cc Hooligan Cylinder Kits 910-0702

S&S Cycle 1200cc to 1250cc Hooligan Cylinder Kits 910-0702

S&S Cycle 00-21 Sportster Models 1200cc to 1250cc Hooligan Kit - Silver

Part Number: SSY-910-0702

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle M8 131 in. Big Bore Kits 910-0762A

S&S Cycle M8 131 in. Big Bore Kits 910-0762A

S&S Cycle M8 131 in. Big Bore Kits 910-0762A

2017+ M8 Models 4.250in Bore 4-5/8in Stroke Cylinder Kit - Wrinkle Black w/ Highlight

Part Number: SSY-910-0762A

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle 117 in. Big Bore Kits 910-0213

S&S Cycle 117 in. Big Bore Kits 910-0213

S&S Cycle 117 in. Big Bore Kits 910-0213

S&S Cycle 07-17 BT 117in Big Bore Cylinder Kit - Silver

Part Number: SSY-910-0213

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle 74 in. Stock Bore Cylinder Kits 91-9013

S&S Cycle 74 in. Stock Bore Cylinder Kits 91-9013

S&S Cycle 74 in. Stock Bore Cylinder Kits 91-9013

S&S Cycle 66-84 BT 3-31/32in Stroke 3-7/16in Bore 8.0 To 1 Compression Cylinder Kit - Gloss Black

Part Number: SSY-91-9013

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle M8 129 in. Big Bore Kits 910-0843A

S&S Cycle M8 129 in. Big Bore Kits 910-0843A

S&S Cycle M8 129 in. Big Bore Kits 910-0843A

2017+ M8 Models 129in Big-Bore Kit 4.375in Stroke Highlighted Cylinders

Part Number: SSY-910-0843A

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle M8 128 in. Big Bore Kits 910-0684A

S&S Cycle M8 128 in. Big Bore Kits 910-0684A

S&S Cycle M8 128 in. Big Bore Kits 910-0684A

2017+ M8 Models 4.250in Bore x 4.5in Stroke 114 To 128 Big Bore Kit

Part Number: SSY-910-0684A

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle M8 131 in. Big Bore Kits 910-0763A

S&S Cycle M8 131 in. Big Bore Kits 910-0763A

S&S Cycle M8 131 in. Big Bore Kits 910-0763A

2007+ BT 4.250in Bore 4.840in - Wrinkle Black w/o Highlight

Part Number: SSY-910-0763A

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle V111 Cylinder Kits 910-0219

S&S Cycle V111 Cylinder Kits 910-0219

S&S Cycle V111 Cylinder Kits 910-0219

S&S Cycle 84-99 BT 84-99 BT 4 1/8in Bore Cylinder Kit For S&S V111 Engine - Natural

Part Number: SSY-910-0219

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle M8 128 in. Big Bore Kits 910-0685A

S&S Cycle M8 128 in. Big Bore Kits 910-0685A

S&S Cycle M8 128 in. Big Bore Kits 910-0685A

2017+ M8 Models 4.250in Bore 4.500in Stroke Cylinder Kit - Wrinkle Black w/o Highlight

Part Number: SSY-910-0685A

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle 124 in. Low Compression Hot Set-Up Cylinder Kits 910-0327

S&S Cycle 124 in. Low Compression Hot Set-Up Cylinder Kits 910-0327

S&S Cycle 124 in. Low Compression Hot Set-Up Cylinder Kits 910-0327

07-16 BT 124in Low Compression 4-1/8in Big Bore Kit - Silver

Part Number: SSY-910-0327

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle 883 to 1200cc Hooligan Cylinder Kits 910-0699

S&S Cycle 883 to 1200cc Hooligan Cylinder Kits 910-0699

S&S Cycle 883 to 1200cc Hooligan Cylinder Kits 910-0699

S&S Cycle 00-21 Sportster Models 883cc to 1200cc Hooligan Kit - Wrinkle Black

Part Number: SSY-910-0699

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle 132 in. Big Bore Cylinder Kits 910-0847

S&S Cycle 132 in. Big Bore Cylinder Kits 910-0847

S&S Cycle 132 in. Big Bore Cylinder Kits 910-0847

S&S Cycle 2017+ M8 Models 4.320in Bore 4.500in Stroke Cylinder Kit - Black Granite w/ Highlight

Part Number: SSY-910-0847

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle M8 High Compression 132/136 in. Big Bore Kits 910-0909A

S&S Cycle M8 High Compression 132/136 in. Big Bore Kits 910-0909A

S&S Cycle M8 High Compression 132/136 in. Big Bore Kits 910-0909A

2017+ M8 Models 132in/136in Big Bore Cylinder Kit +8.5cc Dome (Blk w/ Fins) - 4.320in Bore

Part Number: SSY-910-0909A

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle M8 136 in. Big Bore Kits 910-0848A

S&S Cycle M8 136 in. Big Bore Kits 910-0848A

S&S Cycle M8 136 in. Big Bore Kits 910-0848A

2017+ M8 Models 4.320in Bore 4.625in Stroke Cylinder Kit - Wrinkle Black w/ Highlight

Part Number: SSY-910-0848A

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

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