Piston KitCaracteristicas: Two stroke pistons are made from 4032 silicium Four stroke pistons are made from 2618 silicium the same material used to produce Formula 1 pistons Both include 3% copper in materials for better heat resistance All pistons are forged using a precision heat treatment process that allows for production tolerances of just . 005mm Forged piston tooling allows for the lightest available product Kits include antiwear coated piston, rings,