Made by Wiseco. This is a new never installed part, it is out of the original box. With some minor TLC this piston will be ready for action. Light polish with emery or scotchbrite to shine up some dull spots from shelf sitting. The Wiseco piston pin circlips (2) are missing , but they are available from Wiseco and they are very cheap. These pistons retail for close to $150.00. Save a bundle on this one.