Description CTS Turbo BMW F97/G01 X3M/X3M Competition and F98/G02 X4M/X4M Competition High Flow-CATS are made to maximize exhaust flow for highest power gains. Designed using the latest in CAD technology; this part is made to fit perfectly in place of restrictive factory catalytic converter. Manufactured from CAST T304 stainless steel; hand TIG welded and back-purged to ensure years of reliable performance. In addition to unleashing the power and performance of your 3.0 Twin Turbo, our High Flow-CATS will make your vehicle sound like it really should. When installed with factory exhaust it produces a louder and deeper growl with much more pronounced exhaust “crackle” on downshift. While up-shifting you will enjoy a confident “punch!” as you bang through all 8 gears. The sound will be even louder if you already have an aftermarket exhaust system. Product Details: Designed and tested on a real car in the real world 304 stainless steel, TIG welded back-purged construction 200 Cell High Flow-CATS Great power upgrade with uncompromising performance Incredible sporty exhaust sound, subtle when cruising No drone with factory exhaust Fitment: 2019-2022 F97/G01 BMW X3M 2019-2022 F97/G01 BMW X3M Competition 2019-2022 F98/G02 BMW X4M 2019-2022 F98/G02 BMW X4M Competition To remove the CEL that will occur, proper stage 2 tuning software must be used.