80mm Downpipe Set with 200-Cell Sport Cat

It directly replaces the restrictive factory catalytic converter, utilizing advanced CAD technology for a perfect fit and seamless integration. Constructed from durable CAST T304 stainless steel, this downpipe set is hand TIG welded and back-purged to ensure longevity and reliable performance. The system features 80mm (3.15-inch) diameter piping and incorporates a 200-cell sport catalytic converter, sized at 110mm OD x 90mm Long (4.33" OD x 3.54" Long). Beyond performance, this downpipe set dramatically enhances the vehicle's sound profile. When paired with the factory exhaust, it delivers a louder, deeper growl with more pronounced exhaust crackle on downshifts and a confident 'punch' during upshifts. The sound is further amplified if an aftermarket exhaust system is already installed. This downpipe set is designed for specific BMW models: the 2018-2021 F90 BMW M5 (including Competition Models) and the 2020-2023 F91/92/93 M8 Coupe, Convertible, and Gran Coupe (including Competition Models). Please note that to eliminate the Check Engine Light (CEL) that will occur, proper Stage 2 tuning software must be used.