Athena 80.95mm 4T Forged Racing Piston Kit for Big Bore Cylinder (S4F08100005A)

Four-stroke pistons are made from 2618 silicium - the same material used to produce Formula 1 pistons Includes 3% copper in materials for better heat resistance 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, pin and circlips