Specs
Bore Diameter86.5mm
Stroke90.0mm
Rod5.590
Comp Height1.245
Weightcall
Pin.866 x 2.250
CC-4.0cc
Comp Ratio10.1

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
Side gas ports for better ring seal
Ratios figured for 87mm x .040 head gasket
Top ring down dimension: .300″ 1.338cd – .280″ 1.180cd
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: 0.245″ intake and .230″ exhaust
2618 material for High HP/Boost applications