Considering an ECU remap for your Subaru WRX 2.5 STi 300hp? A Stage 1 remap can take this 2015 - 2017 petrol engine from 300 BHP to 330 BHP and from 407 Nm to 467 Nm of torque (naturally aspirated). This engine scores 4.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Subaru WRX can achieve.
The Subaru WRX 2.5 STi 300hp is a 2.5L naturally aspirated petrol engine producing 300 BHP and 407 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 330 BHP and 467 Nm — a gain of around 30 BHP (10%) and 60 Nm (15%).
This engine has limited remap suitability, with gains weighted towards torque — you will notice the difference most strongly in mid-range pulling power and in-gear acceleration. The tuning headroom is classified as moderate, based on the percentage gain available from the factory output.
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. High tuned torque: check transmission torque capacity and service history.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 2.0T 286hp | 286 → 300 | +14 | 350 → 400 |
| +50 |
| Moderate (5.5/10) |
Get a personalised remap quote for your Subaru WRX. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.
