Excellent less expensive alternative when you are looking for an O.E.M. quality replacement piston. Manufactured in Japan by reputable Original Equipment Manufacturers to ProX exact specifications and high quality standards. Machined from low-expansion, low-friction alloy, the same used by Japanese O.E.M. engine manufacturers. All Pro-X piston kits come complete with Piston, Rings, Wrist Pin and Circlips, ready to install. Sold as a kit. Note: Please measure your cylinder to check clearance before ordering.