BMW 3 Series | ECU Tunes

BMW 3 Series ECU tunes for the B58 (F30 340i, G20 M340i), S55 (F80 M3) and S58 (G80 M3) — Stage 1 through Stage 2+ calibrations via remote OBD flash and bench tuning. The B58 gains 60–80 WHP on Stage 1; the S55 M3 gains 60–80 WHP; the new S58 G80 M3 picks up 80–100 WHP from a flash alone.