22255-86 Keith Black Cast Hypereutectic Pistons

These Keith Black hypereutectic cast pistons are a top-tier choice for Sportster owners looking to improve engine efficiency and longevity. Replacing OEM part 22255-86, these pistons are manufactured from a specialised aluminium alloy that allows for incredibly tight running tolerances, resulting in a quieter engine with reduced fuel and oil consumption. Because the alloy has low heat transfer properties, the piston skirts stay cooler and expansion is kept to a minimum. This kit is sold as a set and includes two pistons, Hastings chrome moly rings, wrist pins, and circlips. Designed to provide maximum power with less total timing than conventional forged pistons, they are an excellent upgrade for both stock rebuilds and performance applications. These pistons ensure your Sportster runs cooler and stronger for the long haul.