Sports Series High Flow Catted Downpipe for 2018-23 M5/M8 S63M Engine Region Spec:US Spec or Non OPF The factory diverter valves were

The factory diverter valves were causing an issue of not being able to hold up against the rigors of high boost application

5" V-Band flange which we have duplicated and CNC machined cut out of billet 304 stainless steel

It features 660 cubic inches of very efficient high density bar  & plate core (35% larger) versus the factory 425 cubic inches of less efficient tube & fin core

Now available for the 2023+ BMW G09 XM S68 Engines

Precision CNC machined throttle body flange ensures leak free connection to throttle body

Sports Series High Flow Catted Downpipe for 2018-23 M5/M8 S63M Engine Region Spec:US Spec or Non OPF The factory diverter valves wereIntroducing our new Sports Series High Flow Catted Downpipes for your twin turbo S63M engine! Fits 2018 23 M5 (F90) & 2018 23 M8 (F92 F93). Key Features: Made in the USA! Manufactured in house. Now available for the 2018+ BMW F90 M5 & 2018+ F92 F93 M8 S63M Engines! High Flow 200 cell metallic catalytic converter Higher Max Horsepower Power Curve Higher Initial Torque Curve. Torque curve hits faster and higher and longer. Better throttle response and