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Upgrade your Harley-Davidson engine with the S&S Cycle 4-inch Big Bore Bolt-In Sidewinder Cylinder Kit. Designed for straightforward installation without the need for machining, balancing, or splitting the crankcases, this kit allows for quick and efficient engine enhancement while the engine remains in the frame. Featuring a cast ductile iron sleeve embedded in cast aluminum, it provides superior heat transfer and durability, ensuring reliable performance under various riding conditions. This kit boosts 88-inch engines to 100 inches, and 96-inch or 103-inch engines to 110 inches, offering significant power increases for street-driven motorcycles. With a high compression ratio of 10.5:1 using stock 85cc heads, the engine becomes highly responsive and dependable, making it suitable for daily riding and performance upgrades alike. The kit includes cylinders, forged pistons, rings, piston pins, clips, and gaskets, providing everything needed for a complete build. Note that this product is not compatible with S&S 79cc heads, ensuring optimal performance with the specified components. The black finish adds a sleek, aggressive look to your engine, complementing a variety of custom builds. Whether you're looking to improve acceleration or overall power, this bolt-in kit offers a practical and reliable solution for serious motorcycle enthusiasts seeking to maximize their engine’s potential.
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