Porsche 911 2011 - 2015 ( 991 ) GT3 3.8i 475hp
Real standard and upgraded performance figures for the GT3 3.8i 475hp engine in the Porsche 911 2011 - 2015 ( 991 ).
Below: measured output for the GT3 3.8i 475hp in the Porsche 911 2011 - 2015 ( 991 ), standard vs. remapped, in both horsepower and torque.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 475 | 440 |
| Stage 1 | 500 | 470 |
| Stage 2 | 512 | 485 |
- Make
- Porsche
- Model
- 911
- Generation
- 2011 - 2015 ( 991 )
- Engine
- GT3 3.8i 475hp
- Fuel type
- Petrol
Frequently asked questions
Is Stage 1 tuning safe for the Porsche 911 2011 - 2015 ( 991 ) GT3 3.8i 475hp?
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 GT3 3.8i 475hp make after tuning?
Standard output is 475 HP / 440 Nm; Stage 1 on this engine typically reaches 500 HP / 470 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Porsche 911 2011 - 2015 ( 991 ) GT3 3.8i 475hp 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 GT3 3.8i 475hp 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.