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CP Forged Pistons Subaru EJ257 WRX STI (Stroker) Bore 100.5mm 8.5:1 CR SC7436

CP Forged Pistons Subaru EJ257 WRX STI (Stroker) Bore 100.5mm 8.5:1 CR SC7436

CP Standard Shelf Pistons Features

Dedicated forgings

Balanced to + or 1 gram

Wrist pins provided at no cost

Pin fitting provided at no cost

Accumulator Grooves

Dual forced pin oilers

Pick lock grooves

Fully CNC machined

USA Made



Make: Subaru

Model: Impreza WRX STi

Engine: EJ257 + 83mm Stroker

Compression Ratio: 8.5:1

Pin Size: 23mm

Compression Height: 1.123

Rod Length: 130.5mm

Stroke: 83

Bore: 100.5mm

Material: 2985 Alloy

Bore Size: +1.0mm

Standard Pin (Included): 905-2500-18CP1S

Upgraded Pin (Not Included): 0.200" Wall: 905-2500-20CP3S or 0.260" Wall: 905-2500-26CP3S

Pin Locks (Included): None

Ring Part#: RS1658-3957-0

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