Buick Rainier 2004 - 2007 4.2 V8 279hp
Real standard and upgraded performance figures for the 4.2 V8 279hp engine in the Buick Rainier 2004 - 2007.
The Buick Rainier 2004 - 2007 4.2 V8 279hp is one of the engines we work on regularly — here's what a stage remap typically changes for it.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 279 | 373 |
| Stage 1 | 295 | 395 |
| Stage 2 | 303 | 406 |
- Make
- Buick
- Model
- Rainier
- Generation
- 2004 - 2007
- Engine
- 4.2 V8 279hp
- Fuel type
- Petrol
Frequently asked questions
Is Stage 1 tuning safe for the Buick Rainier 2004 - 2007 4.2 V8 279hp?
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 4.2 V8 279hp make after tuning?
Standard output is 279 HP / 373 Nm; Stage 1 on this engine typically reaches 295 HP / 395 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Buick Rainier 2004 - 2007 4.2 V8 279hp 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 4.2 V8 279hp 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.