Quote:
Originally Posted by JunkStory
Exact same thing with my stock exhaust and the exhaust actuator/valve disabled. The PE exhaust doesn't have this valve, so I doubt there's any problem with your installation. There is a slight droning when going up a hill with constant throttle. It was annoying at first but I'm getting used to it.
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Some have written the disabling of the actuator has a negative effect on low end torque due to reduced back pressure, but I have yet to confirm this from a BMW service tech. My guess is you haven't had any problems?