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Powersports Top End Engine Kits

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S&S Cycle 84-99 BT 96in 3-5/8in Big Bore Cylinder & Piston Kit For S&S SH96 Engines - Wrinkle Black

Part Number: SSY-91-7707

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

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

ProX Top End Kit BRP 600HO Etec '09-18

Part Number: PXR-11-5613-000

Not Yet Reviewed

Estimated Ship Date: Oct 30, 2026 if ordered today

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Estimated Ship Date: Oct 30, 2026 if ordered today

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

Part Number: SSY-920-0145

Not Yet Reviewed

Estimated Ship Date: Nov 30, 2026 if ordered today

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Estimated Ship Date: Nov 30, 2026 if ordered today

Cyl. Head Serv. Kit, Polaris®, RZR 900, 2015-2016

Part Number: KPM-82-83240

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026 if ordered today

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Estimated Ship Date: Nov 27, 2026 if ordered today

Cyl. Head Serv. Kit, Polaris®, RZR 900, 2013-2014

Part Number: KPM-82-83210

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026 if ordered today

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Estimated Ship Date: Nov 27, 2026 if ordered today

Cyl. Head Serv. Kit (89mm Bore), KTM®, RFS's 450-560cc, 2000-2009

Part Number: KPM-96-96560

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

BORE KIT - 88CC

Part Number: BRM-411-HXR-7001

Not Yet Reviewed

Estimated Ship Date: Oct 28, 2026 if ordered today

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Estimated Ship Date: Oct 28, 2026 if ordered today

Racing Spring Kit, Titanium, 0.630" Lift, Harley-Davidson®, Milwaukee-Eight, 2017-'24

Part Number: KPM-20-23800

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Top End Engine Kits STANDARD BORE KIT STANDARD BORE KIT

Part Number: CLW-60001-K01

Not Yet Reviewed

Estimated Ship Date: Oct 30, 2026 if ordered today

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Estimated Ship Date: Oct 30, 2026 if ordered today

Top End Engine Kits CYL WORKS BIG BORE KIT POLARIS CYL WORKS BIG BORE KIT POLARIS RZR 800

Part Number: CLW-61002-K01

Not Yet Reviewed

Estimated Ship Date: Oct 30, 2026 if ordered today

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Estimated Ship Date: Oct 30, 2026 if ordered today

ProX Top End Kit AC 600CTEC '14-21

Part Number: PXR-11-5614-000

Not Yet Reviewed

Estimated Ship Date: Nov 2, 2026 if ordered today

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Estimated Ship Date: Nov 2, 2026 if ordered today

Racing Spring Kit, HT Steel, 0.450" Lift, Polaris®, Various 4 cyl., 2020-2023

Part Number: KPM-82-86065

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

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: Dec 7, 2026 if ordered today

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Estimated Ship Date: Dec 7, 2026 if ordered today

S&S Cycle 79-84 BT 88in Sidewinder 3-5/8in Big Bore Cylinder Kit - Gloss Black

Part Number: SSY-91-9001

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 84-99 BT 96in 3-5/8in Big Bore Cylinder & Piston Kit For S&S SH96 Engines - Natural

Part Number: SSY-91-7207

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

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

Part Number: SSY-910-0625

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

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 Royal Enfield 650 Twins 750cc Big Bore Kit

Part Number: SSY-920-0144

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

84-99 BT 96in 3 5/8in Big Bore Cylinder & Intermediate Compression Piston Kit - Natural

Part Number: SSY-91-7054

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

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 84-99 BT 88in 3 5/8in Big Bore Cylinder & Piston Kit - Natural

Part Number: SSY-91-7002

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

2017 M8 Touring 4.250in Bore x 4.375in Stroke 107 To 124 Big Bore Kit

Part Number: SSY-910-0625A

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

ENGINE CYLINDERS, 07-UP TWINCAM (EXC 17 FLH/FLT INC 06 DYNA), POWER PACK 585GE SIL

Part Number: SSY-330-0667

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

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