Downpipe Mst Performance + catalyst for Toyota Supra MK5 3.0 GR B58 - non OPF - MST-BW-5807DP-1 - * FOR MOTORSPORT USE ONLY* This is one of the highest-efficiency downpipes worldwide. Suitable for BMW/Toyota B58 3.0 engine vehicles. Bringing even more performance & exciting exhaust sounds to your vehicle.     Features * Largest diameter downpipe for B58 worldwide * 6" diameter Euro 6 400 cell catalytic converter * No CEL guarantee * Large diameter design gives you the same efficiency as straight pipes * CNC adapter corresponding to largest diameter design turbos * Dyno test results on stock vehicle, additional 18-25hp & 4kgm, also enhances performance for tuned vehicles. * Suitable for 1000hp or more vehicles * Greatly reduces exhaust pressures & temperatures * Possesses both performance & cleaner exhaust emission * Suitable for either stock or tuned vehicles * We have versions for both GPF and non-GPF vehicles   Fits: BMW M340i 3.0T B58 2019-2023 BMW 540i 3.0T B58 2016-2023 BMW 640i 3.0T B58 2017-2020 Toyota Supra (MK5) 3.0 GR (B58) 2019-2023 BMW Z4 M40i (G29) 3.0T (B58) 2019-2023