Specs
Bore Diameter90mm (+0.160in Over)
Compression Ratio9.0:1
Rod Length5.659in / 143.75mm
Stroke86mm Standard
PinH-13 .905in x 2.250in x .225in

Piston 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 @ 8.660 deck
Top ring down dimension: .300″-.265″ 1.070cd
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: 0.150″ intake and .070″ exhaust
2618 material for High HP/Boost applications