Considering an ECU remap for your Porsche Boxster GT4 4.0 420hp? A Stage 1 remap can take this 2016 -> (718) petrol engine from 420 BHP to 440 BHP and from 420 Nm to 440 Nm of torque (naturally aspirated). This engine scores 3/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Porsche Boxster can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Porsche Boxster GT4 4.0 420hp is a 4.0L naturally aspirated petrol engine producing 420 BHP and 420 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 440 BHP and 440 Nm — a gain of around 20 BHP (5%) and 20 Nm (5%).
This engine has low 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 |
|---|
| 2.0T 250hp | 250 → 350 | +100 | 310 → 460 | +150 | Excellent (8/10) |
| 2.0T 300hp | 300 → 350 | +50 | 380 → 460 | +80 | Good (6.5/10) |
| S 2.5T 350hp | 350 → 400 | +50 | 420 → 520 | +100 | Good (6.5/10) |
| GTS 2.5T 365hp | 365 → 420 | +55 | 430 → 510 | +80 | Good (6.5/10) |
| GTS 4.0 400hp | 400 → 440 | +40 | 420 → 440 | +20 | Limited (3.5/10) |
Get a personalised remap quote for your Porsche Boxster. 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.
