BMW M340i B58 tune
Remote BMW M340i B58 tuning for stock turbo, downpipe, and E30 blend setups with datalog review, revisions, and worldwide support.
Typical ranges, not a measured or guaranteed figure. Actual results depend on fuel, hardware, and the car’s baseline.
- • 91/93 octane
- • E30 blend
- • Flex fuel / ethanol-capable setups
- High-flow or catless downpipe
- Intercooler upgrade
- Fresh spark plugs
- Consistent 93 or ethanol blend
The G20 / G21 BMW M340i runs the B58. Every stage we offer on that engine, what each one costs, and the hardware it expects live on one page rather than being restated per model.
BMW B58 Gen 2 tuning — stages, prices and reference outputs for this engine.
Ready to move? Build a quote for your BMW M340i.
How does remote tuning work for the BMW M340i?
You send your vehicle details, mod list, fuel, and goals. We review the setup, build a base file, review logs, and revise the calibration until the package is dialed in for the BMW M340i.
What fuel should I run on a tuned BMW M340i?
Use the exact fuel the calibration is built for. Many B58 setups are tuned on 93 octane or an ethanol blend like E30, but the best option depends on the hardware, climate, and fueling support on your car.
What supporting mods are common for a BMW M340i tune?
Typical supporting mods include a quality downpipe, healthy ignition components, proper intercooling or charge-air cooling, and consistent fuel quality. The exact requirements depend on how aggressive the calibration is.
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Ready to tune your BMW M340i?
Send over the current setup, fuel plan, and goals. We will point you toward the right flash, logging process, and revision path for your build.