Subaru WRX 2015 - 2017 2.5 STi 300hp
Real standard and upgraded performance figures for the 2.5 STi 300hp engine in the Subaru WRX 2015 - 2017.
Below: measured output for the 2.5 STi 300hp in the Subaru WRX 2015 - 2017, standard vs. remapped, in both horsepower and torque.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 300 | 407 |
| Stage 1 | 330 | 467 |
| Stage 2 | 345 | 497 |
- Make
- Subaru
- Model
- WRX
- Generation
- 2015 - 2017
- Engine
- 2.5 STi 300hp
- Fuel type
- petrol
Frequently asked questions
Is Stage 1 tuning safe for the Subaru WRX 2015 - 2017 2.5 STi 300hp?
Yes — Stage 1 for this engine is a software-only remap calibrated to stay within its stock mechanical limits (turbo, clutch, fueling), so no hardware changes are required.
How much more power does the 2.5 STi 300hp make after tuning?
Standard output is 300 HP / 407 Nm; Stage 1 on this engine typically reaches 330 HP / 467 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Subaru WRX 2015 - 2017 2.5 STi 300hp remap take?
Once your original file is uploaded through the member panel, most requests for this engine are completed within a few hours.
Can the 2.5 STi 300hp be reverted to its original file?
Yes — we keep the original file on record for the request, so the ECU can be put back to stock at any time.