Pro X Piston Kit Husqvarna / KTM 500cc-501cc Pro X delivers top-tier piston kits compatible with Japanese-engine standards, employing similar materials and manufacturing techniques for superior engine performance. This offers an optimal choice for engine refreshment. Features: Forged low-expansion, low-friction alloy construction OEM style tin-based piston coating Includes: Piston Piston Pin Piston Clips Piston Rings Note: Does not include gaskets or wrist pin bearing.