The SwitchPath Cat Back Exhaust features dual 3 CNC mandrel - bent .065 wall T304L stainless steel tubing from downpipes to tip outlets with a precision - engineered X - pipe in between. Equipped with valved rear sections, the SwitchPath Cat Back retains all of the M5s valve behavior when changing driving modes andor using the exhaust button found on the console. The AWE Performance Mid Pipes replace the factory mid section with a 3 stainless steel X - pipe, and are included in the Cat Back SwitchPath configuration. All tip options are 4, slash - cut, and include the AWE logo and double - walling to ensure a mirror finish even under hard usage. All tips are individually adjustable, allowing depth into the bumper to be set according to personal taste.