Direct-fit catless downpipe for B58C engines with OPF - G20 M340i, G30 540i, G29 Z4 M40i and GR Supra A90. No welding, no cutting: bolt-on fit using OEM flange and included adapter.
3.5 inch mandrel-bent 304 stainless steel reduces back pressure, sharpens throttle response and improves turbo spool. Replaces BMW 18329897313.
For track day or fast-road use only - catalyst removal triggers DME error
Not for road use in UK/EU due to emissions regulations
Compatible with stock exhaust hangers and mounting points
