Considering an ECU remap for your Ford Mustang GT 5.0 V8 420hp? A Stage 1 remap can take this -> 2014 petrol engine from 420 BHP to 445 BHP and from 524 Nm to 554 Nm of torque (naturally aspirated). This engine scores 3.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Ford Mustang can achieve.
The Ford Mustang GT 5.0 V8 420hp is a 5.0L naturally aspirated petrol engine producing 420 BHP and 524 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 445 BHP and 554 Nm — a gain of around 25 BHP (6%) and 30 Nm (6%).
This engine has limited remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, 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 |
|---|---|---|---|---|---|
| 4.0 V6 205hp | 205 → 225 | +20 | 319 → 340 | +21 | Moderate (4/10) |
| GT 4.6 V8 300hp | 300 → 320 | +20 | 430 → 460 | +30 | Limited (3.5/10) |
| 3.7 V6 305hp | 305 → 325 | +20 | 380 → 410 | +30 | Limited (3.5/10) |
| GT 4.6 V8 319hp | 319 → 339 | +20 | 440 → 470 | +30 | Limited (3.5/10) |
| GT500 5.4 V8 507hp | 507 → 560 | +53 | 650 → 750 | +100 | Moderate (4.5/10) |
Get a personalised remap quote for your Ford Mustang. 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.
