Pontiac Grand Prix 2004 - 2009 5.3 V8 303hp
Real standard and upgraded performance figures for the 5.3 V8 303hp engine in the Pontiac Grand Prix 2004 - 2009.
Standard vs. upgraded performance for the Pontiac Grand Prix 2004 - 2009 5.3 V8 303hp, based on real files we've processed for this exact engine.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 303 | 438 |
| Stage 1 | 325 | 460 |
| Stage 2 | 336 | 471 |
- Make
- Pontiac
- Model
- Grand Prix
- Generation
- 2004 - 2009
- Engine
- 5.3 V8 303hp
- Fuel type
- petrol
Frequently asked questions
Is Stage 1 tuning safe for the Pontiac Grand Prix 2004 - 2009 5.3 V8 303hp?
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 303hp make after tuning?
Standard output is 303 HP / 438 Nm; Stage 1 on this engine typically reaches 325 HP / 460 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Pontiac Grand Prix 2004 - 2009 5.3 V8 303hp 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 303hp 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.