Your Vehicle
Subaru Impreza 2.0T WRX STi 265hp
Technical Specifications
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible.
Stage 1: file 100 € online + installation 350 € at the workshop (via the OBD port) Book now
Power HP
Torque Nm
Buy the Stage 1 file, pay the installation at the workshop
100 € VAT included: the file developed for your engine, paid online
Installation: 350 € network price, the workshop may charge less, paid at the chosen workshop (via the OBD port) · terms
Power Graph
Subaru Impreza 2.0T WRX STi 265hp: da 265 a 295HP
Remapping Subaru Impreza
MasterTuning develops remapping for Subaru. La Subaru Impreza 2.0T WRX STi 265hp può passare da 265 HP a 295 HP con un incremento di 30 HP.
The development of each remap is customized by MasterTuning.
- 100% customised files with lifetime warranty
- Reference values for Stage 1: the file is developed on your vehicle and checked in the workshop
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details Subaru Impreza 2.0T WRX STi 265hp
The Subaru Impreza 2.0T WRX STi 265hp is equipped with a petrol engine that produces 265 HP and 340 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this Subaru can achieve 295 HP (+11%) and 400 Nm (+18%).
Our Stage 1 tuning for the Impreza 2003 - 2005 delivers an impressive gain of +30 HP and +60 Nm, optimizing the petrol engine's performance while maintaining reliability and staying within safe parameters.
The engine code EJ20 identifies this specific powerplant configuration. The Denso 68HC16 ECU is professionally recalibrated to unlock hidden potential while preserving engine longevity.
With 265 HP from factory, this Subaru Impreza is already a performance vehicle. Our remapping extracts even more potential, delivering exhilarating acceleration and enhanced driving dynamics for enthusiasts who demand the best.
Technical Specifications — Subaru Impreza 2.0T WRX STi 265hp
Factory technical data for the Subaru Impreza 2.0T WRX STi 265hp (2003 - 2005), used by MasterTuning engineers to develop a remap tailored to this specific powerplant. Figures shown are reference values for Stage 1; the file is developed on your vehicle and checked in the workshop.
| Engine code | EJ20 |
|---|---|
| ECU / Control unit | Denso 68HC16 |
| Fuel | Petrol |
| Compression ratio | 8.0 |
| Bore × stroke | 92.0 X 75.0 mm |
| Stock power | 265 HP · 340 Nm |
| Remapped power (Stage 1) | 295 HP (+30) · 400 Nm (+60) |
Don't want to touch the ECU?
Rapid Dimsport add-on modules connect to the engine sensors with original connectors: they fit in a few hours and come off without a trace, leaving the factory software untouched. Useful on a leased car, one still under warranty or one you plan to sell soon. Check which ones fit your Subaru Impreza.
Frequently Asked Questions - Subaru Impreza
How much power can I gain from remapping my Subaru Impreza?
With MasterTuning Stage 1, your Subaru Impreza 2.0T WRX STi 265hp can gain +30 HP (from 265 to 295 HP) and +60 Nm of torque. This represents a 11% increase in power.
Which ECU does the Subaru Impreza 2.0T WRX STi 265hp use?
The Subaru Impreza 2.0T WRX STi 265hp uses the Denso 68HC16 engine control unit. MasterTuning recalibrates this ECU for Stage 1 and Stage 2.
What is the engine code of the Subaru Impreza 2.0T WRX STi 265hp?
The engine code of the Subaru Impreza 2.0T WRX STi 265hp is EJ20. You can find it in the vehicle documents or on the engine plate.
Is ECU remapping safe for the Subaru Impreza engine?
Yes, MasterTuning's remapping for the Subaru Impreza 2.0T WRX STi 265hp is developed within safe parameters. Each file is developed on your vehicle, checked in the workshop and stays within the mechanical limits of the EJ20 engine.
Is the Subaru ECU remapping reversible?
Absolutely. The original factory calibration of your Subaru Impreza is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my Subaru warranty?
ECU remapping may affect your manufacturer warranty. We recommend checking your specific warranty terms. Many of our customers choose to remap after the warranty period or accept this trade-off for the significant performance gains.
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Book your remap or ask for a quote
Stage 1 can be bought online and is done at the workshop you choose; for Stage 2 we send you a quote.
Stage 2 is quoted on request: write to us and we will reply with price and timing.
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