Dinan Resonator Delete Kit/X-PipeThe Dinan Resonator Delete Kit for the F97 X3M and F98 X4M introduces a more aggressive tone and an increase in volume over the stock system. Coupled with the associated Dinan exhaust, the sound is further enhanced into a smoother, fuller, and more aggressive note that is befitting of the performance SAV. The offering removes the hydro formed factory resonated section and replaces it with 70mm T304 stainless steel tubing for freer flowing