Piston Kit 53,96Mm 23195BPiston Kit (Cast Replica)Cast Replica Cast piston in original OE form All pistons are heat treated with a T 5 hardening and tempering cycle All piston skirts are coated with a high tech Molybdenum Disulphite coating for faster break in time and increased piston life Cast piston kits are gravity cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston Replica pistons and all rings are OEM