JE PISTONS Piston Kit - 4.250" - M8 391731

Piston Kit - 4.250" - M8 Propriety aligned grain flow forging technology for maximum tensile strength suited for high performance enviroment, Cermic crown coating protects the piston by reducing heat transfer, Internal and external bracing maintains optimized strength-to-weight ratio for longevity, 3D undercrown milling in non-critical areas reduces overall weight, Lateral gas ports and accumulator groove maintain power-producing ring seal even at high RPM and high boost, Skirt coating reduces operating friction and wear throughout the life of piston, Offset pin reduces piston rock and minimize engine operating noise, Skirt notches for optimal clearance at the bottom dead center, Kit includes two pistons, premium ring pack, wrist pins and wire locks