2020 Engine Kits & Rotating Assemblies

S&S Cycle 2017+ M8 4.250in Bore 550C Cam w/ Chrome Pushrods Power Pack - Wrinkle Black w/ Highlight

Part Number: SSY-310-1101B

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017+ M8 Models 4.250in Bore 550G Cam w/ Chrome Pushrods Power Pack - Black w/ Highlight

Part Number: SSY-310-1102A

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017+ M8 Models 128in Power Pack w/ Chrome Pushrod Tubes - Wrinkle Blk w/ Highlight

Part Number: SSY-310-1103B

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017+ M8 128in CI Oil Cooled Power Pack w/ Chrome Pushrod Tubes w/ Highlight - Wrinkle Blk

Part Number: SSY-310-1104A

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017 M8 Models 128in Oil Cooled Power Pack w/ Chrome Pushrod Tubes w/o Highlight

Part Number: SSY-310-1105B

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017 M8 Models 128in CI Oil Cooled w/ Chrome Pushrod Tubes & Highlighted Fins

Part Number: SSY-310-1106A

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017+ M8 4.250in Bore 550C Cam w/ Chrome Pushrods Power Pack - Black Granite w/ Highlight

Part Number: SSY-310-1107B

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017+ M8 4.250in Bore 550G Cam w/ Chrome Pushrods Power Pack - Black Granite w/ Highlight

Part Number: SSY-310-1108A

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017+ M8 Models 128in Power Pack w/ Chrome Pushrod Tubes - Granite Blk w/ Highlight

Part Number: SSY-310-1109B

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017+ M8 128in CI Oil Cooled Power Pack w/ Chrome Pushrod Tubes w/ Highlight Black Granite

Part Number: SSY-310-1110A

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

Top End Engine Kit, M8 124 in. Big Bore, Wrinkle Black Finish, 4.250 in., Forged Piston, Harley-Davidson®, Kit

Part Number: SSY-910-0681

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

ENGINE PERFORMANCE, M8 MODELS W/114", 128" BIG BORE KIT M8 BLK

Part Number: SSY-910-0685

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

128" BIG BORE KIT M8 BLK

Part Number: SSY-910-0733

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

PERFORMANCE, 131" KIT - BLK GRANITE M8

Part Number: SSY-910-0764

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

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

Part Number: SSY-910-0843

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017+ M8 Models 129in Big-Bore Kit 4.375in Stroke Non-Highlighted Cylinders

Part Number: SSY-910-0844

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 2017+ M8 Models 4.5in Stroke 132in Big Bore Kit

Part Number: SSY-910-0845

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

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

Part Number: SSY-910-0846

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

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: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle Royal Enfield 650 Twins 750cc Big Bore Kit

Part Number: SSY-920-0144

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle Royal Enfield 650 Twins 865cc Big Bore Kit

Part Number: SSY-920-0145

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 86-21 Sportster Models 1250cc Conversion Kit - Silver

Part Number: SSY-910-0689

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 86-21 Sportster Models High Compression 1250cc Conversion Kit - Silver

Part Number: SSY-910-0690

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

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: Feb 27, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order

S&S Cycle 86-21 Sportster Models 1250cc Conversion Kit - Wrinkle Black

Part Number: SSY-910-0691

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

• Free Shipping
• $10 Summit Bucks
• Special Order