ZRP forged pistons for Subaru WRX-STi engines with the 2.5L EJ25 or EJ257 engine. The product is listed for WRX-STi models from 2004 onwards.
When choosing, check the engine version and the required compression ratio. Supplier data states ratios of 8.5:1 and 8.0:1, but without a clear connection to a specific piston version.
- Engine: 2.5L EJ25 / EJ257
- Use: Subaru WRX-STi, 2004 onwards
- SKU: 43303-P
- Manufacturer: ZRP
Suitable for: Subaru Impreza I (GC/GF) / 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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