92-1402 100"/107" 4" bore piston kit. +.020"

When your 100-inch or 107-inch S&S Super Sidewinder engine needs a rebuild, this .020-inch oversize piston kit provides the precision you need. Sold as a kit, it includes forged pistons, wrist pins, clips, and rings designed for 4-inch bore engines. These pistons are also compatible with the out-of-production 100-inch Evo-style engines used in Shovelhead frames. Because these are high-performance forged parts, it is essential that a qualified technician handles the installation, checking all tolerances and ensuring the rider follows a strict break-in schedule to seat the rings properly against the cylinder walls.