Includes beefed up ring lands to resist the abuse most turbo pistons are subjected to in high boost applications. "Fire Control Groove" technology is used in both the first and second ring land to reduce blow by. These pistons include rings, wrist pin locks and are available with .901 wrist pins meaning minimal machining is required to make the factory connecting rods fit. Custom .927, .912, .905 and .866 wrist pins may take 6-8 weeks to manufacture. These are race proven products from a company that has been known to deliver extremely accurate piston tolerances. IN STOCK!