ZRP 1400HD forged pistons by Wiseco are designed for 2.5-litre Subaru EJ255/EJ257 engines. The pistons have an 8.5:1 compression ratio and a stated diameter of 99.75 mm.
- For Subaru EJ255 / EJ257 engines
- Engine capacity: 2.5 l
- Series: ZRP 1400HD
- Compression ratio: 8.5:1
- Diameter: 99.75 mm
Suitable for: Subaru Impreza II (GD/GG) / III (GE/GV) / III (GH/GR) / III (STI/GRB), Subaru Wrx I (GJ/V1) / I (STI/VAB/VAF/VAG).


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