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MHD Tuning
MHD Stage 2+ FlexFuel Tune — N55
OTA flash from your phone. The most advanced N55 tune available.
320–420+ WHP on E-fuel
Beginner install
SKU: MHD-N55-S2FF
$415USD
Listed atMHD Tuning· direct from manufacturer
Wireless OTA flash via iOS or Android app
Dynamic FlexFuel maps (E0–E85)
Full data-logging for tuning verification
Multiple power maps (economy, sport, race)
Compatible with MHD Bootmod3 interface
Community-backed — largest N55 tuner platform
Linked to the manufacturer · opens in a new tab · no markup
Compatible with 15 BMW N55 models. Includes F10 535i, F30 335i, F32 435i and all N55 platforms. /
MHD is the most widely used N55 tune on the market, and for good reason. The Stage 2+ FlexFuel map is designed for vehicles running upgraded HPFP (DS25 or equivalent), catless downpipe, upgraded intercooler, and chargepipes. The FlexFuel variant reads live ethanol content from the MHD CAN Analyzer and dynamically adjusts fueling, ignition advance, and boost targets to extract maximum power from whatever is in the tank — whether it's 98 pump, E30, or E85. Flash-to-start in under 20 minutes from your phone.
Key highlights
Wireless OTA flash via iOS or Android app
Dynamic FlexFuel maps (E0–E85)
Full data-logging for tuning verification
Multiple power maps (economy, sport, race)
Compatible with MHD Bootmod3 interface
Community-backed — largest N55 tuner platform
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