BMW Z4 E85 - 2003 - 2008 3.5i - N55 - Twinscroll - 306hp
Real standard and upgraded performance figures for the 3.5i - N55 - Twinscroll - 306hp engine in the BMW Z4 E85 - 2003 - 2008.
The BMW Z4 E85 - 2003 - 2008 3.5i - N55 - Twinscroll - 306hp is one of the engines we work on regularly — here's what a stage remap typically changes for it.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 306 | 400 |
| Stage 1 | 350 | 520 |
| Stage 2 | 372 | 580 |
- Make
- BMW
- Model
- Z4
- Generation
- E85 - 2003 - 2008
- Engine
- 3.5i - N55 - Twinscroll - 306hp
- Fuel type
- Turbo-Petrol
Frequently asked questions
Is Stage 1 tuning safe for the BMW Z4 E85 - 2003 - 2008 3.5i - N55 - Twinscroll - 306hp?
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 3.5i - N55 - Twinscroll - 306hp make after tuning?
Standard output is 306 HP / 400 Nm; Stage 1 on this engine typically reaches 350 HP / 520 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a BMW Z4 E85 - 2003 - 2008 3.5i - N55 - Twinscroll - 306hp 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 3.5i - N55 - Twinscroll - 306hp 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.