M Performance Exhaust will behave the same as stock in terms of the valves being open more often in Sport+ and during aggressive driving. It sounds great, makes the right amount of noise without being overly loud or annoying and it's quiet enough during relaxed cruising without being completely absent. My favorite mod so far. However if there is a time where it really is a "neighbor nuisance" it's during cold starts.
__________________
2015 BMW i8 in Matte Metallic Grey:
H&R Springs
21" ADV.1 ADVNL2 MV2 CS Wheels
Coming Soon:
2016 BMW M4 GTS De-Winged and Bagged on 22s
|