BHP+30 hp (10%)
Standard
300 hp
Tuned
330 hp
Torque+60 Nm (15%)
Standard
407 Nm
Tuned
467 Nm
Suitability
Moderate (4.5/10)Gains Profile
Torque-focusedHeadroom
MediumSubaru WRX 2.5 STi 300hp ECU Remapping
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.
How this engine compares
- 2ndof 4 Subaru WRX engines by power gain
- 39%of the 9,842 engines we hold gain data for see a smaller power increase
- 41%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
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.
Considerations
!Naturally aspirated engine: gains are usually limited; results vary widely.
!High tuned torque: check transmission torque capacity and service history.