High Flow Middle Exhaust

The Dinan High Flow Middle Exhaust is engineered to provide a more aggressive and voluminous sound for the 2018-2023 BMW M550i xDrive. This mid-pipe replaces the factory's hydro-formed center section and resonator with larger, 3-inch diameter T304 stainless steel tubing, promoting freer-flowing exhaust gases. At the heart of this system is a meticulously crafted X-pipe crossover, constructed from mandrel-bent tubing. This design minimizes restriction and helps to create a smoother, fuller, and more aggressive exhaust note by promoting even flow to both banks of the exhaust tips and eliminating unwanted sound nuances. The use of 100% 304 stainless steel construction ensures durability and corrosion resistance. The manufacturer states that this part is legal for sale or use on all emissions-controlled, uncontrolled, and racing vehicles as it does not affect vehicle emissions. However, it is confirmed to fit only with the Dinan Free Flow Axle Back and stock exhaust systems; fitment with other axle-back units is not guaranteed.