Specs
Bore Diameter100mm (+0.020in Over)
Compression Ratio8.5:1
Rod Length5.137in / 130.5mm
Stroke79mm Standard
PinH-13 .905in x 2.500in x .225in

Piston Features:
3D milling on piston crowns for ready to install finish
Offset pins for quiet operation
Moly skirt coating for friction loss and skirt wear protection
Ratios figured for 101mm x .0236 head gasket
Top ring down dimension: .300″
Premium 8620 .180W wrist pins chamfered for roundwire locks included
Premium 1.2mm x 1.2mm x 2.0mm ring package included
Over-sized valve pockets – for larger than stock valve sizes
Valve pocket depth: 0.220″ intake and .220″ exhaust
2618 material for High HP/Boost applications