Diamond Racing Pistons Set HD Pin Subaru BRZ Scion FR-S FA20 4U-GSE 86.5mm +0.5mm -14.5cc 9.5:1
SpecsBore Diameter86.5mm (+0.020in Over)Compression Ratio9.5:1Rod Length5.090in / 129.3mmStroke86mm StandardPinH-13 .866in x 2.250in x .225inPiston Features:3D milling on piston crowns for ready to install finishOffset pins for quiet operationMoly skirt co
Specs
Bore Diameter86.5mm (+0.020in Over)
Compression Ratio9.5:1
Rod Length5.090in / 129.3mm
Stroke86mm Standard
PinH-13 .866in x 2.250in 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 89.5mm x .022″ head gasket @ 8.070″ Deck Height
Top ring down dimension: .250″
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: 0.100″ intake and 0.090″ exhaust
2618 material for High HP/Boost applications
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