Single PistonFits Gm Chevy 4.3L 262 Vin B 5.7L 350 Flat TopSize = .040 OversizedBore Diameter (STD)AlloyTop Ring2nd RingOil RingPin DiameterCompression Height101.60mm (4.000in)Standard5/64in5/64in3/16in0.92731.540Need Rings? To check our inventory, please Click Here for Cast or Click Here for Moly