5-Inch Catless B58 Downpipe

The MAD 5 inch Catless B58 Downpipe is a high-performance aftermarket upgrade designed for BMW B58 engine vehicles to increase power and torque while improving exhaust flow. This catless design eliminates the factory catalytic converter, offering further performance gains and an improved exhaust note, making it ideal for enthusiasts seeking to enhance their vehicle's performance and sound. Installation is straightforward with basic hand tools. Key features include smooth bends for maximum airflow without drone, compatibility with both right-hand and left-hand drive vehicles, and a flex section. This downpipe is compatible with a range of BMW models including the M240i, 340i, 440i, 540i, 740i, X3 M40i, X4 M40i, X5, X6, X7, Z4 M40i, and the Toyota Supra 3.0L (2019+). Notably, it does not fit 2025+ BMW M340i models.