Diamond Racing Forged Pistons Mitsubishi Evo 4 5 6 7 8 9 4G63T 100mm Stroker 85.5mm -21.0cc 9.0:1

DescriptionSpecs Bore Diameter 85.5mm ( 0.020in Over) Compression Ratio 9.0:1 Rod Length 5.900in / 150mm Stroke 100mm Stroker Pin .866in x 2.250in x .180inPiston Features: 3D milling on piston crowns for ready to install finish Offset pins for quiet operation Side gas ports for better ring seal Moly skirt coating for friction loss and skirt wear protection Ratios figured for 87mm x .040 head gasket Top ring down dimension: .325″-.300″ 1.020cd Premium 8620 .180W wrist pins chamfered for roundwire locks included Premium 1.0mm x 1.2mm x 2.8mm ring package included Over-sized valve pockets – for larger than stock valve sizes Valve pocket depth: 0.200″ intake and .190″ exhaust 2618 material for High HP/Boost applications