2023 BMW M340i xDrive

completed on: september 23rd, 2025

project spotlight

This 2023 BMW M340i xDrive came through for a complete Stage 3 flex fuel transformation, turning BMW’s luxury sport sedan into a true street monster. With upgraded fueling, turbo, cooling, and transmission components paired to flawless ECU and TCU calibrations, this M340i is dialed for big power and reliability.

Dyno Proven: 750 WHP / 750 WTQ (in 90°F Dyno Room)

  • Pure Turbos 900 Upgrade (@pureturbos)
  • Wagner Tuning Manifold + Port Injection (@wagnertuningusa)
  • Precision Raceworks Stand-Alone LPFP (@precisionraceworks)
  • Tensility Motorsports Harness (@tensilitymotorsports)

Performance Upgrades:

  • Mishimoto Charge Pipe + Auxiliary Coolers (@mishimoto)
  • Dinan Catback Exhaust (@dinancars)
  • FEMTO ECU Unlock (@femtoevo)
  • MHD+ with Full DI + PI Control (@mhd.tuning)
  • Stage 2 Transmission Build by Deka Clutches (@deka_clutches)
  • XHP TCU Calibration (@xhpflashtool)

With 750 horsepower and torque to match, this M340i puts down supercar-level performance while retaining AWD traction and street usability, proving just how far the B58 platform can go.