Gains by engine › 4.2 V8
Remap gains
Remap 4.2 V8
Typical gain ranges for the 4.2 V8 engine (published dynos, market data). Actual gains depend on vehicle condition, fuel and the file used — each product page shows the ECU references (HW/SW) to check before buying.
| Stage 1 | +35 to +60 hp |
|---|---|
| Stage 2 | +55 to +85 hp |
Available files for this engine
BMW 5 M550D — Bosch MDG1 MD1CP002 — Original
19,95 €
BMW 5 M550D — Bosch MDG1 MD1CP002 — Stage 1
39,90 €
BMW 5 550i — Siemens-Continental — Original
19,95 €
BMW 5 550i — Siemens-Continental — Stage 1
39,90 €
No file for your 4.2 V8?
Send us your original ECU read: the file is written for your vehicle, and reworked until it suits you.
Request a custom file →Going further
Stage 1 or Stage 2 on a 4.2 V8?
What each level actually requires mechanically, and the gains to expect.
Converting a petrol engine to E85
What the conversion needs, what it saves, and which engines take it well.
Would rather learn to do it yourself? Our courses cover reading an ECU, WinOLS, checksums and recovering a bricked ECU.
Deletion options are for competition / private track use. Always back up your original file before writing.