The performance program for the S58-powered BMW M3 (G80) and M4 (G82). Catless downpipes and supporting hardware for BMW's most capable inline-six yet — with more parts landing soon.
2021+ M cars ship with a locked factory ECU: read our ECU Unlock Guide, then talk to us about a custom Stage 1 or 2 calibration — dyno-proven, with lifetime revisions. Contact us.
