S&S 4" Big Bore Bolt-In Sidewinder Cylinder Kit - 100" - Silver for Harley Touring, Softail & Dyna

The S&S 4" Big Bore Bolt-In Sidewinder Cylinder Kit gives you a precise, durable fit for a strong, healthy top end.

Fits Harley-Davidson Touring (1999-2006), Softail (1999-2006) and Dyna (1999-2006) models. Check the fitment chart below to confirm your exact year and model.

Part of the S&S Sidewinder line.

• Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frame
• Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer
• 88" engines are boosted to 100"
• 96" and 103" engines are boosted 110"
• 10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams
• Complete kit includes cylinders, forged pistons, rings, piston pins, clips and gaskets
• Not for use with S&S 79cc heads.