BMW 5 Series | ECU Tunes
BMW 5 Series ECU tunes for the N55 (F10 535i), B58 (G30 540i) and S63TU (F90 M5) — Stage 1 through Stage 2+ calibrations. The F90 M5’s S63TU twin-turbo V8 gains 80–120 WHP from a Stage 1 flash; the B58 540i picks up 60–80 WHP. Remote OBD flash and bench tuning both available.