Part#: SC7422

Model: WRX STI

Engine: EJ257

Compression Ratio: 8.2

Compression Height (in): 1.208

Pin Size: 23mm

Rod Length: 130.5

Stroke: 79

Bore Size: 99.75mm (+0.25mm From Standard)

Ring Thickness (mm): 1.2 x 1.2 x 2.0

Ring Part#: RS1658-3927

Made In: USA

Part Description:

CP pistons are compatible with oversized valves and high lift camshafts. CP Pistons represent the highest quality and is engineered for maximum power.

This Piston full Set includes: 4 aluminum pistons / 4 sets of piston rings / 4 wrist pins / 8 locks