Engine Rotating Assemblies & Rebuild Kits

Pro LS 4340 Piston and Rod Kit, 378 Cid., 4.075 bore, 3.622 stroke, 6.125 rod, 12cc dish, 9.9:1 @ 65cc, 9.4:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR36L08012

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Pro LS 4340 Piston and Rod Kit, 378 Cid., 4.080 bore, 3.622 stroke, 6.125 rod, 2cc dome, 11.6:1 @ 65cc, 10.9:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR36L0802

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Pro LS 4340 Piston and Rod Kit, 402 Cid., 4.000 bore, 4.000 stroke, 6.125 rod, 8cc dish, 11:1 @ 65cc, 10.4:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR400008

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HD IN-FRAME KIT

Part Number: CLE-4685149STD

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Estimated Ship Date: Aug 4, 2025 if ordered today

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HD IN-FRAME KIT

Part Number: CLE-45955251STD

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Estimated Ship Date: Jul 28, 2025 if ordered today

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HD IN-FRAME KIT

Part Number: CLE-4685100STD

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Estimated Ship Date: Aug 4, 2025 if ordered today

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HD IN-FRAME KITS

Part Number: CLE-45955241STD

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Estimated Ship Date: Jul 28, 2025 if ordered today

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

Part Number: SSY-910-0651

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Estimated Ship Date: Jul 28, 2025 if ordered today

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Repair Kit, Top End, 66.420mm Bore, 6.60 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40003-2K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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TOP END KIT HYPERDRYVE 94.96/+0.01 11.4:1 YAM

Part Number: NTI-NA-40009-BHK

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Repair Kit, Top End, 84.450mm Bore, 10.00 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40011K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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TOP END REPAIR KIT

Part Number: NTI-NA-40019-4K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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TOP END KIT HYPERDRYVE 103.97/+1.00 YAM

Part Number: NTI-NA-40025-4K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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TOP END KIT HYPERDRYVE 102.97/STD YAM

Part Number: NTI-NA-40025K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Piston, TOP END REPAIR KIT

Part Number: NTI-NA-40080K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Repair Kit, Top End, 92.47mm Bore, 10.20 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50004-2K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-50012-2K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-50019-2K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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TOP END REPAIR KIT

Part Number: NTI-NA-50024-6K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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TOP END REPAIR KIT

Part Number: NTI-NA-50025-4K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Piston, NAMURA PISTON KIT

Part Number: NTI-NA-50081

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Piston, TOP END REPAIR KIT

Part Number: NTI-NA-50081K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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TOP END KIT TWIN CYLINDER 90.42/STD POL

Part Number: NTI-NA-50093K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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TOP END KIT TWIN CYLINDER 90.96/STD CAN

Part Number: NTI-NA-80010K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Repair Kit, Top End, 66.340mm Bore, 8.70 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NX-10025K

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Estimated Ship Date: Aug 12, 2025 if ordered today

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