Chopped Them Off.....
The resonators in the stock exhaust system, that is lol.....exhaust tone is louder, deeper and shift farts are audible now from inside.
You will gain some interior rumble, which is the way they should come from the factory
2014 M5...AMS downpipes, BMS tune, lead foot
2011 X5M....Downpipes, exhaust, dyno tuned
2008 Ducati 848....pearl white, Termignoni exhaust
CLS55 and C6Z06 (previous rides)