Dinan High Flow Middle Exhaust 3in - BMW G30 M550i xDrive

The G30 M550i's factory center section is hydro-formed and resonated — sized for noise suppression, not flow. Dinan's High Flow Middle Exhaust replaces it with 3" T304 stainless steel tubing (76mm vs. 70mm stock) and inserts a mandrel-bent X-pipe crossover in place of the factory resonator. Mandrel bending holds the tube's full diameter through the bend — unlike stamped X-pipes — so the crossover delivers minimum restriction while promoting even flow distribution between exhaust banks. The X-pipe also resolves tonal inconsistencies from uneven stock flow, producing a louder, smoother, fuller exhaust note. Bolt-on installation, mounting hardware included.

Features:

+ 3" (76mm) T304 stainless steel tubing — replaces 70mm stock center section
+ Mandrel-bent X-pipe crossover — minimum restriction, even flow distribution
+ Deletes factory resonator between catalyst and rear muffler
+ 100% 304 stainless steel, bolt-on with included hardware
+ BMW G30 M550i xDrive fitment