B58 Downpipe with 200 Cell Sports Cat & Heat Shield - MTC Motorsport, Part No. DP-B58-200

For B58 owners chasing fast road or track day gains without the decat hassle: this MTC Motorsport downpipe swaps the restrictive OEM unit for a 4.5 inch SS304 TIG-welded assembly with integrated 200 cell sports cat and full heat shield.

• Fits: G20 M340i, G21/G22 440i, G30/G32 540i/640i, G11 740i, G14/G15/G16 840i, G29 Z4 M40i, A90 Supra (OPF/PPF only)
• Stage 1 ready: pairs cleanly with ECU remaps - no CELs, no emissions test fails when installed correctly
• Not a decat: retains catalytic function but flows like a race part - Euro 5 compliant, MOT-legal if your tester checks paperwork not pipe colour
• Real-world result: +22 bhp typical on stage 1, sharper throttle response, deeper B58 tone - zero drone, no rasp, just purpose
• Heat shield included: wraps the cat core fully - protects wiring looms, intercooler pipework and your bonnet liner
• Search terms covered: B58 downpipe, G20 downpipe, A90 Supra downpipe, 200 cell sports cat, fast road downpipe, track day B58, stage 1 B58, OPF downpipe, B58 heat shield downpipe