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Stage 1 for your Z4: garage prices
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Gains by stage(4)
Power
374 hp
Torque
500 Nm
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Tuners · ChiptuneFILE
Stage 1 file for the M40i - 374ch
Send the ECU read, get back an optimised and tested file.
- Stage 1, Stage 2, E85
- Checksum corrected, original file kept
- For professionals only
Everything about M40i - 374ch tuning
Tuning the M40i - 374ch found in the BMW Z4 is one of the most popular performance upgrades. This engine offers excellent potential for power and torque gains.
On ChiptuneMAP, find verified gain data for each stage, compare tuner prices and find the ideal professional for your project.
Gains summary by stage
On the BMW Z4 M40i - 374ch, tuning delivers up to +86 hp and +140 Nm depending on the stage. Stock vs tuned figures:
| Stage | Power | Torque | Indicative price |
|---|---|---|---|
| Stage 1 | 374 → 420 hp | 500 → 580 Nm | On quote |
| Stage 2 | 374 → 460 hp | 500 → 640 Nm | On quote |
| E85 Flexfuel | 374 → 374 hp | 500 → 500 Nm | On quote |
| E85+ | 374 → 420 hp | 500 → 580 Nm | On quote |