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  • BMW G20 M340i Stage 1 Flash BMW G20 M340i Stage 1 Flash
  • BMW G20 M340i Stage 2 Flash BMW G20 M340i Stage 2 Flash

BMW G20 M340i B58 Performance Engine Flash Tune

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We are proud to announce an early release of performance flash tune for the G20 M340i. Our reflash was designed and meticulously perfected by in-house experts to deliver impressive gains with minimal expenses. Extensive improvements were performed to the software in order to provide significantly improved performance, great efficiency and unparalleled reliability.

-Flashable over OBD2 port with no need of DME removal, including newest Post-July update. 

-DME Tampering Shadow code disable

-Optimized Boost Control

-Optimized Valve Lift and Timing Control

-Extensively modified knock control to ensure reliability and safety

-Cold start and VMAX delete (Optional) 


and much more

As with any modification that significantyly raises the output of the engine, we highly recommend having spark plugs properly gapped. Suggested gap for Stage 1 and Stage 2 flash is 0.025".


*M-Boot:  M-Boot was developed by Mission Performance as an additional solution for all of our customers that either want to upgrade performance stage or "temporary" go back to stock for a dealer visit. Since M-Boot is a custom written bootloader, there is no additional chip/hardware needed to be added to the ECU. In addition of having the ability of  reflashing the computer without sending it into our offices, M-Boot offers great features as CVN and Calibration ID spoofing. 

Stock Stage 1 Stage 2
Horsepower 320hp 460hp 492hp 
Torque  330lb-ft 440lb-ft 500lb-ft
Sport Gauges 400hp/400lb-ft 480hp/480lb-ft 480hp/480lb-ft
Cat Delete Option None None Yes
Speed Limit Delete  None Yes Yes
Emissions All States Legal All States Legal Offroad/Racing Only