Introducing the MAD F90 Primary Catted Downpipes - the ultimate BMW F90 M5 upgrade for enhanced engine potential, increased power, and torque throughout the RPM range. Constructed from top-quality T304 stainless steel, these downpipes are designed for longevity. Mandrel-bent for optimal flow, they feature smooth transitions to minimize turbulence and improve exhaust gas flow, resulting in noticeable power, torque gains, and a more aggressive exhaust note. Installation is simple, requiring no cutting or welding. MAD F90 Primary Downpipes are designed to bolt directly onto your BMW F90 M5's factory exhaust system and include all necessary hardware and gaskets for an easy installation. Upgrade your BMW F90 M5 with MAD F90 Primary Downpipes and unleash your engine's full potential, leaving the stock exhaust system behind. Features: Compatible with right-hand drive and left-hand drive vehicles 200 CEL High Flow Cats Smooth bends for maximum airflow without any drone Up to 30HP increase on the stock turbos, even more on upgraded turbos Lifetime warranty on defects and fitment 90 day return period All orders ship in 1-2 business days Spot on fitment Flex section Fitment: 2018+ BMW F90 M5 2019+ BMW F92 M8 Note for Euro 2021+ LCI Vehicles:Before ordering, please check which downpipe style your vehicle has. Our MAD downpipes do fit vehicles equipped with OPF filters, but it's important to confirm fitment. Please ensure your current downpipes have a V-band slip style connection, not a flange/2-bolt design. This will help ensure proper compatibility. Disclaimer:For race use only. This product is not certified for use on public roads and may not comply with local emissions regulations. Additionally, it does not prevent the illumination of the Check Engine Light (CEL). Please consult your local laws and regulations before installation.