Big Bore Cylinder Kit 110" Forged Pistons 10.5:1 Compression

The S&S Cycle Sidewinder Cylinder and Piston Kit is a comprehensive big bore upgrade designed for Harley-Davidson motorcycles from 2007-2017. This kit allows for a significant increase in displacement, boosting 88" engines to 100" and 96"/103" engines to 110", all without requiring the engine to be split or cases machined. Constructed with a cast ductile iron sleeve within a cast aluminum housing, this kit ensures superior heat transfer for improved performance and longevity. The included forged pistons, rings, piston pins, clips, and gaskets, along with a 10.5:1 compression ratio (when paired with stock 85cc heads), create a streetable yet responsive engine package that benefits from performance camshafts. However, it is important to note specific fitment exclusions. This kit is not recommended for trike models and is not for use on Twin-Cooled models. Additionally, it is not compatible with S&S 79cc heads. Key specifications include a 4" bore size, a 4-3/8" stroke length, and a 110" displacement. This kit is ideal for street riding applications seeking enhanced performance.