S&S Cycle 4-inch Big Bore Sidewinder Cylinder Kit for 100-inch Engines – Black (Part #910-0646)

4" Big Bore Bolt-In Sidewinder® Cylinder Kit - 100" - Black

Upgrade your Harley-Davidson engine with the S&S Cycle 4-inch Big Bore Sidewinder Cylinder Kit, designed specifically for 100-inch engines. This bolt-in kit allows for straightforward installation without the need for machining, balancing, or splitting the crankcases, enabling installation with the engine still mounted in the frame. The kit features a cast ductile iron sleeve embedded in cast aluminum, providing superior heat transfer properties that help maintain optimal operating temperatures during performance riding. This setup boosts 88-inch engines to 100 inches, while 96-inch and 103-inch engines are increased to 110 inches, offering significant power gains with minimal hassle. The high-compression ratio of 10.5:1, combined with stock 85cc heads, results in a very streetable and reliable engine that responds well to performance cams, making it ideal for aggressive street riding and performance upgrades. The complete kit includes cylinders, forged pistons, rings, piston pins, clips, and gaskets, providing all necessary components for a comprehensive upgrade. Please note, this kit is not compatible with S&S 79cc heads, so ensure your setup matches the specifications. Designed for ease of installation and dependable performance, this kit is a popular choice among enthusiasts looking to boost their Harley-Davidson's power and reliability without extensive engine modifications.

Features:

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

• Engine compatibility: Fits 88" engines and boosts to 100"; 96" and 103" engines boosted to 110"

• Superior heat transfer: Cast ductile iron sleeve embedded in cast aluminum for effective heat dissipation

• High compression: 10.5:1 ratio enhances power while maintaining streetability

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

• Performance upgrade: Responds well to performance cams for increased horsepower

• Engine compatibility note: Not for use with S&S 79cc heads