Specs
Bore Diameter 83mm (+0.020in Over)
Compression Ratio 8.6:1
Rod Length 5.669in / 144mm
Stroke 92.8mm Standard
Pin H-13 .827in x 2.250in x .225in
Note Requires Aftermarket Rods non-tapered 21mm Pin

Piston Features:
Gen 1-3 Applications
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 83.5mm x .035 head gasket @ 8.661 Deck Height
Top ring down dimension: .250"
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: 0.125" intake and 0.095" exhaust
2618 material for High HP/Boost applications