Dyno-tested Stage 1 + Decat tuning file for Subaru Impreza WRX STI 2.5L Turbo with Denso ECU. Designed for improved spool, throttle response, and decat operation. Includes Stage 1 with and without catalyst delete. Supplied in full binary format for flashing via Alientech Kess V2.
Overview Feature list Copyright info Releases (1) Discussion
- Stage 1 + Decat tuning for Subaru WRX STI 2.5L Turbo (Denso ECU 4D42594006)
- Catalytic converter delete calibration for improved exhaust flow
- Boost maps optimised for stronger low- and mid-range torque
- Ignition and fuel maps reworked for performance and safety
- Throttle response sharpened without compromising drivability
- Includes clean Stage 1 with catalytic support and Decat variant
- Compatible with Alientech Kess V2 — OBD flashable
- Checksum corrected — no editing required
- Delivered as full binary: Original + 2 tuned versions
- Track-tested and validated on dyno