S&S CYCLE 4-Inch Big Bore Sidewinder® Cylinder Kit - 110 Inch for Harley-Davidson - Black 910-0651

4" Big Bore Bolt-In Sidewinder® Cylinder Kit - 110" - Black

Upgrade your Harley-Davidson engine with the S&S CYCLE 4-Inch Big Bore Sidewinder® Cylinder Kit designed for enhanced performance and reliability. This bolt-in kit requires no machining, balancing, or splitting of the crankcases, allowing for straightforward installation with the engine still mounted in the frame. Featuring a cast ductile iron sleeve embedded in cast aluminum, the cylinders ensure superior heat transfer, helping maintain optimal engine temperatures during high-performance riding. The kit boosts 88-inch engines to 100 inches, while 96-inch and 103-inch engines are increased to 110 inches, providing significant power gains without sacrificing streetability or dependability. The high compression ratio of 10.5:1, combined with stock 85cc heads, creates an engine that is both responsive and reliable, making it ideal for daily use and spirited riding. It responds well to performance cams, offering additional tuning potential for enthusiasts seeking more horsepower. The complete kit includes precision-machined cylinders, forged pistons, rings, piston pins, clips, and gaskets, ensuring a comprehensive upgrade for your motorcycle. Note that this kit is not compatible with S&S 79cc heads, so compatibility should be verified prior to installation. Perfect for riders looking to increase their Harley's displacement and performance, this kit delivers a robust boost in power while maintaining the durability and streetability Harley owners expect.

Features:

• Bolt-in installation: No machining, balancing, or splitting of crankcases required

• Cast ductile iron sleeve in cast aluminum for superior heat transfer

• Increases engine displacement from 88" to 100" or 96"/103" to 110"

• High compression ratio of 10.5:1 for a streetable and responsive engine

• Complete kit includes cylinders, forged pistons, rings, piston pins, clips, and gaskets

• Designed for easy installation with engine still in the frame

• Not compatible with S&S 79cc heads