2019 Engine Kits & Rotating Assemblies

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

Part Number: SSY-910-0692

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Estimated Ship Date: Feb 27, 2026 if ordered today

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

Part Number: SSY-310-1102A

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-310-1103B

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-310-1104A

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-310-1106A

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-310-1107B

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-310-1108A

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-310-1109B

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-310-1110A

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Estimated Ship Date: Feb 25, 2026 if ordered today

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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

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Estimated Ship Date: Feb 25, 2026 if ordered today

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PERFORMANCE, 131" KIT - BLK GRANITE M8

Part Number: SSY-910-0764

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-910-0843

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-910-0844

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-910-0846

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-910-0847

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Estimated Ship Date: Feb 25, 2026 if ordered today

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

Part Number: SSY-920-0145

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Estimated Ship Date: Feb 25, 2026 if ordered today

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PERFORMANCE, 131" KIT - HIGHLIGHTED FINS M8

Part Number: SSY-910-0762

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

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CRANKSHAFT, M8 FLYWHEEL 4-3/8" TAPERED

Part Number: SSY-320-0601

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Estimated Ship Date: Feb 27, 2026 if ordered today

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CRANKSHAFT, M8 FLYWHEEL 4-3/8" FULL

Part Number: SSY-320-0604

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Estimated Ship Date: Feb 27, 2026 if ordered today

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CRANKSHAFT, M8 FLYWHEEL 4-5/8" FULL

Part Number: SSY-320-0605

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Estimated Ship Date: Feb 27, 2026 if ordered today

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ENGINE PERFORMANCE, 17-18 M8 MODELS, BIG BORE CYLINDER SET BLK

Part Number: SSY-910-0682

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Estimated Ship Date: Feb 27, 2026 if ordered today

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S&S Cycle 2017 M8 Models 124in CI Oil Cooled w/ Chrome Pushrod Tubes & Highlighted Fins

Part Number: SSY-310-1053A

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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S&S Cycle 2017+ M8 124in CI Oil Cooled Power Pack w/ Black Pushrod Tubes w/ Highlight

Part Number: SSY-310-1056B

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Estimated Ship Date: Mar 16, 2026 if ordered today

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S&S Cycle 2017 M8 Models 124in CI Oil Cooled w/ Black Pushrod Tubes & Highlighted Fins

Part Number: SSY-310-1058A

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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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: Mar 16, 2026 if ordered today

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