CP FORGED PISTON SET for 04+ Subaru EJ257 WRX STI 99.5mm STD 8.2:1

  • $885.15
    Unit price per 


CP Subaru pistons are available standard or oversized. They are compatible with oversize valves, higher lift cams and high performance rings. CP pistons represent the highest quality and are engineered for maximum power.

-Deep valve relief depth accommodates high lift camshaft
-Made for +1mm valve sizes
-Custom skirt cam and barrel design
-Accumulator grooves
-High strength aluminum forgings
-High performance rings
-Fully CNC machined and balanced to +/- 1 gram
-Wrist pins included at no additional cost
-Double pin oilers, force fed oil ring
-Pick lock grooves for easy lock removal
-Pin fitting included

Part Number: SC7420
Bore (in): 3.917"
Bore (mm): 99.50mm
Size: Standard
Stroke: 79
Rod: 130.5
Comp: 1.208
Compession Ratio: 8.2
Pin (mm): 23
Ring Thickness: 1.2 x 1.2 x 2.0mm
Cylinders: 4

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