B58 Catted Downpipe 4.5in SS304 200 Cell - MTC Motorsport, Part No. MTC-B58-CDP

For E9X, FXX, GXX and A90 owners running the B58 (including M340i G20/G21, 440i G22, Z4 M40i G29, Supra A90) who want a catted downpipe that actually flows - not just one that passes an MOT.

• Not decat, not track-only: 200-cell sports cat balances flow, torque and emissions compliance for fast road or daily driver use
• 4.5in diameter, full 304 stainless construction, TIG welded, with integrated heat shield - built for repeated track day abuse, not showroom dust
• Fits all OPF/PPF B58 platforms without modification; no spacers, no flange tweaks, no ‘slight grinding required’ nonsense
• Compatible with stage 1 and stage 2 maps; no ECU remap needed to run it stock - but gains scale cleanly if you do
• Search terms this answers: B58 catted downpipe, G20 downpipe catted, Supra A90 OPF downpipe, B58 fast road downpipe, 200 cell downpipe B58, MTC-B58-CDP