BMW 1 Series | ECU Tunes

BMW 1 Series ECU tunes for the N55 3.0T I6 (F20 M135i / M140i) — Stage 1 and Stage 2 calibrations via remote OBD flash. The N55 gains 40–60 WHP on a stock turbo Stage 1 map; add a downpipe and intake for Stage 2 at 360–380 WHP.