Hummer H3 2006 - 2010 5.3 V8 300hp
Real standard and upgraded performance figures for the 5.3 V8 300hp engine in the Hummer H3 2006 - 2010.
The Hummer H3 2006 - 2010 5.3 V8 300hp is one of the engines we work on regularly — here's what a stage remap typically changes for it.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 300 | 430 |
| Stage 1 | 320 | 450 |
| Stage 2 | 330 | 460 |
- Make
- Hummer
- Model
- H3
- Generation
- 2006 - 2010
- Engine
- 5.3 V8 300hp
- Fuel type
- petrol
Frequently asked questions
Is Stage 1 tuning safe for the Hummer H3 2006 - 2010 5.3 V8 300hp?
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 5.3 V8 300hp make after tuning?
Standard output is 300 HP / 430 Nm; Stage 1 on this engine typically reaches 320 HP / 450 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Hummer H3 2006 - 2010 5.3 V8 300hp 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 5.3 V8 300hp 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.