S&S Cycle 910-0651 Sidewinder 4in Big Bore Kit 110ci Wrinkle Black

Inspired by S&S Pro Stock drag race engines, the S&S Cycle Sidewinder 4-inch big bore kit utilizes a ductile cast iron liner wrapped in cast aluminum for optimum thermal conductivity and performance. This kit offers the biggest cylinder bore that can be installed in a stock crankcase without machining, making it an ideal bolt-in performance upgrade for Harley-Davidson Twin Cam engines.

Key Features:

• Bolt-in installation requires no machining, re-balancing, or engine removal
• 10.5:1 compression ratio with stock 85cc heads creates a very streetable and dependable engine that also responds well to performance cams
• Ductile cast iron liner wrapped in cast aluminum for superior thermal conductivity
• Boosts 96in and 103in engines to 110 cubic inches
• Wrinkle black powder coat finish for durability and style
• Complete kit includes cylinders, forged aluminum pistons, piston rings, wrist pins, clips and gaskets

This comprehensive kit provides everything needed for installation and delivers significant power gains while maintaining excellent street manners. Note: Not for use with S&S 79cc heads.