Pontiac GTO 2004 - 2006 6.0 V8 400hp
Real standard and upgraded performance figures for the 6.0 V8 400hp engine in the Pontiac GTO 2004 - 2006.
These are real standard and Stage 1 (and where available, Stage 2) figures for the Pontiac GTO 2004 - 2006 6.0 V8 400hp — not a generic estimate for the model range.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 400 | 542 |
| Stage 1 | 420 | 570 |
| Stage 2 | 430 | 584 |
- Make
- Pontiac
- Model
- GTO
- Generation
- 2004 - 2006
- Engine
- 6.0 V8 400hp
- Fuel type
- petrol
Frequently asked questions
Is Stage 1 tuning safe for the Pontiac GTO 2004 - 2006 6.0 V8 400hp?
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 6.0 V8 400hp make after tuning?
Standard output is 400 HP / 542 Nm; Stage 1 on this engine typically reaches 420 HP / 570 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Pontiac GTO 2004 - 2006 6.0 V8 400hp 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 6.0 V8 400hp 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.