AWE Performance Mid Pipe for BMW F22 M235iThe AWE Performance Mid Pipe is non - resonated and replaces the factory resonated section with straight - through 3 - inch T304L stainless steel tubing. Perfect fitment, ready to rumble. IMPORTANT NOTES ABOUT THESE PRODUCTSIf you're looking to equip your F2X with the Performance Mid Pipe only, please note that cutting the stock exhaust is necessary.