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S&S Cycle 4 in. Sidewinder Big Bore Kits
ENGINE CYLINDERS, 07-UP TWINCAM (INC 06 DYNA), 4" CYLINDER KIT SIL
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Estimated Ship Date: Oct 19, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
910-0650
Part Type:
Product Line:
Summit Racing Part Number:
SSY-910-0650
Cylinder Included:
Yes
Pistons Included:
Yes
Piston Material:
Forged aluminum
Piston Rings Included:
Yes
Wrist Pin Included:
Yes
Wrist Pin Bearing Included:
No
Head Gaskets Included:
Yes
Base Gaskets Included:
Yes
Cam Chain Tensioner Gaskets Included:
No
Exhaust Gaskets Included:
No
Valve Cover Gaskets Included:
No
Quantity:
Sold as a kit.
Notes:
Kit includes 4 in. bore pistons with silver cylinders,
S&S Cycle 4 in. Sidewinder Big Bore Kits
Inspired by S&S Pro Stock drag race engines, S&S Cycle 4 in. Sidewinder big bore kits utilize a ductile cast iron liner wrapped in cast aluminum for optimum thermal conductivity and performance. These bolt-in kits do not require machining, re-balancing, or engine removal, and include just about everything you'll need to complete the installation. S&S Cycle 4 in. Sidewinder kits offer the biggest cylinder bore that can be installed in a stock crankcase without machining!
Features:
* Low-friction ductile cast iron liner
* 10.5:1 compression
* Bolts in with no machining, balancing, or splitting the crankcases
* 88 in. engines are boosted to 100 in.
* 96 in. and 103 in. engines are boosted to 110 in.
* Complete kits include cylinders, pistons, gaskets, and instructions
* Wrinkle black and silver cylinders that match stock finish
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Some parts are not legal for use in California or other states with similar laws / regulations
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