Quote:
Originally Posted by mawzi
The exhaust flap has nothing to do with it. It's just closed at low rpm and open at high rpm.
But the rasp is a known issue with catless downpipes like your VRSF. My downpipes are catted. From what I've heard, I'm not supposed to have this problem.
But yes, definitely fix that leak first. It changes the sound for sure.
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Not the vent opening and closing, but the additional hardware that's located within the exhaust. Besides the mufflers, the rest of the exhaust system is exactly the same amongst E92 N54s.
I'll get this exhaust right eventually. Sucks because the stock 335is exhaust note is orgasmic, I just had to tinker didn't I..