Single PistonFits Ford 5.8L 351 Modified Dish TopSize = .060 OversizedBore Diameter (STD)AlloyTop Ring2nd RingOil RingPin DiameterCompression Height101.60mm (4.000in)Standard5/64in5/64in3/16in0.97531.921Need Rings? To check our inventory, please Click Here for Cast or Click Here for Moly