Ford Mustang 2015 - 2018 GT 5.0 V8 421hp
Real standard and upgraded performance figures for the GT 5.0 V8 421hp engine in the Ford Mustang 2015 - 2018.
These are real standard and Stage 1 (and where available, Stage 2) figures for the Ford Mustang 2015 - 2018 GT 5.0 V8 421hp — not a generic estimate for the model range.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 421 | 542 |
| Stage 1 | 441 | 562 |
| Stage 2 | 451 | 572 |
- Make
- Ford
- Model
- Mustang
- Generation
- 2015 - 2018
- Engine
- GT 5.0 V8 421hp
- Fuel type
- Petrol
Frequently asked questions
Is Stage 1 tuning safe for the Ford Mustang 2015 - 2018 GT 5.0 V8 421hp?
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 GT 5.0 V8 421hp make after tuning?
Standard output is 421 HP / 542 Nm; Stage 1 on this engine typically reaches 441 HP / 562 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Ford Mustang 2015 - 2018 GT 5.0 V8 421hp 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 GT 5.0 V8 421hp 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.