BMW Z4 2019 onwards M40i STAGE 1
Takes the M40i from 340hp to 400hp, and 500Nm to 580Nm.
Where the gain arrives
Standard against STAGE 1 through the rev range.
- Standard 340hp
- Remapped 400hp
- Standard 500Nm
- Remapped 580Nm
Standard against STAGE 1
| Measure | Standard | After | Gain |
|---|---|---|---|
| Power | 340hp | 400hp | up 60 |
| Torque | 500Nm | 580Nm | up 80 |
What STAGE 1 involves
Stage 1 is for a standard car with nothing fitted. We read the original file off the ECU, write a calibration developed for the M40i, then road or rolling road test it before handing the car back. Nothing is added and nothing is removed, so it looks and services exactly as it did.
It takes most of a day. We keep your original file, so it can go back to standard at any point. Figures here are for a healthy M40i, and we check the car over before writing to it.
See the full M40i page for every file and figure, the other engines on this Z4, or all BMW remapping.
Book your Z4 STAGE 1
We write and test every file at our Aston workshop, on our own rolling road. Ring us with your reg and we will tell you what your car should make before you commit to anything.