DIAMOND PISTONS - GM LS - 4.000" BORE - 4.000" STROKE - 6.125" ROD - 2.0CC FLAT TOP - 11518-R1-8

•3D milling on piston crowns for ready to install finish •Valve pockets designed to work with most aftermarket cylinder heads •Offset pins for quiet operation •Moly skirt coating for friction loss and skirt wear protection •Top ring down dimension: .250” •Ratios figured for .040 head gasket •Premium 1.2mm/1.2mm/3.0mm ring package included •Premium 8620 .185w wrist pins included •2618 material for high horsepower, nitrous, and forced induction applications