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Subaru WRX 2.5 STi 300hp
Technical Specifications
Power hp
Torque Nm
Power Graph
Subaru WRX 2.5 STi 300hp: da 300 a 330HP
Remapping Subaru WRX
MasterTuning is a leader in developing remapping for Subaru. La Subaru WRX 2.5 STi 300hp può passare da 300 HP a 330 HP con un incremento di 30 HP.
The development of each remap is customized by MasterTuning.
- 100% tested and customized files guarantee
- Tested and developed on a 4x4 dyno
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details Subaru WRX 2.5 STi 300hp
The Subaru WRX 2.5 STi 300hp is equipped with a petrol engine that produces 300 HP and 407 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this Subaru can achieve 330 HP (+10%) and 467 Nm (+15%).
Our Stage 1 tuning for the WRX 2015 - 2017 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 EJ25 identifies this specific powerplant configuration. The Denso SH7058 GW / Hitachi SH72543 ECU is professionally recalibrated to unlock hidden potential while preserving engine longevity.
With 300 HP from factory, this Subaru WRX 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 WRX 2.5 STi 300hp
Factory technical data for the Subaru WRX 2.5 STi 300hp (2015 - 2017), used by MasterTuning engineers to develop a tailored, dyno-tested remap for this specific powerplant.
| Engine code | EJ25 |
|---|---|
| ECU / Control unit | Denso SH7058 GW / Hitachi SH72543 |
| Fuel | Benzina |
| Compression ratio | 8.2 |
| Bore × stroke | 99.5 X 79.0 mm |
| Stock power | 300 HP · 407 Nm |
| Remapped power (Stage 1) | 330 HP (+30) · 467 Nm (+60) |
Frequently Asked Questions - Subaru WRX
How much power can I gain from remapping my Subaru WRX?
With MasterTuning Stage 1, your Subaru WRX 2.5 STi 300hp can gain +30 HP (from 300 to 330 HP) and +60 Nm of torque. This represents a 10% increase in power.
Is ECU remapping safe for the Subaru WRX engine?
Yes, MasterTuning's remapping for the Subaru WRX 2.5 STi 300hp is developed within safe parameters. All calibrations are tested on our 4x4 dyno and stay within the mechanical limits of the EJ25 engine.
Is the Subaru ECU remapping reversible?
Absolutely. The original factory calibration of your Subaru WRX 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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