Downpipes F9X X3M/X4M

Our F97 X3M / F98 X4M downpipes replace the restrictive, heavy OEM units with a 3.5 inch high flow design that trims real weight while bolting right up to both OEM and aftermarket exhausts. Run Catless for the loudest, freest flowing setup we build, with nothing standing between you and maximum performance. Run Resonated Catless for that same wide open flow with a more refined, less rowdy note. Or run Catted, built with high flow 200 cell catalytic converters, for a real step up over stock without the smell that comes with going catless. For race use only.