I might be mistaken but I was under the impression that a louder exhaust means the waste-gates are kept open more, and increases turbo lag.
__________________
2020 X3MC
2009 135i: AW/CR Aluminum Trim, 6 speed, M-Sport, Premium, Heated Seats, Ipod, BMW Performance Pedals, BMW Performance SSK, BMW Performance Exhaust, BMW Performance Grills E93 M3 FSB
|