Considering an ECU remap for your Hummer H3 3.7 242hp? A Stage 1 remap can take this 2006 - 2010 petrol engine from 242 BHP to 260 BHP and from 328 Nm to 350 Nm of torque (naturally aspirated). This engine scores 4/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Hummer H3 can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Hummer H3 3.7 242hp is a 3.7L naturally aspirated petrol engine producing 242 BHP and 328 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 260 BHP and 350 Nm — a gain of around 18 BHP (7%) and 22 Nm (7%).
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.
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 |
|---|
| 3.5 220hp | 220 → 240 | +20 | 305 → 325 | +20 | Moderate (4/10) |
| 5.3 V8 300hp | 300 → 320 | +20 | 430 → 450 | +20 | Limited (3.5/10) |
Get a personalised remap quote for your Hummer H3. 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.
