22216-88A Keith Black Cast Hypereutectic Pistons

Keith Black brings professional drag-racing engineering to the Harley-Davidson world with these hypereutectic cast pistons. Crafted from a proprietary aluminum alloy, these pistons are designed to be lightweight while maintaining tighter running tolerances than traditional forged pistons—sometimes as close as 0.0005 inches. This precision engineering results in a quieter engine, reduced oil consumption, and better heat management at the piston skirts. The high ring placement also helps to minimize detonation, allowing for maximum power with less total timing. Each kit is sold as a set and comes complete with two pistons, Hastings chrome moly rings, wrist pins, and circlips. This specific set fits Sportster and Tube frame models and is a direct replacement for OEM 22216-88A.