Quote:
Originally Posted by The Nightman
I felt that acceleration improved with the more free flowing 330i muffler but wasn't sure if I was imagining things. Nice to know that you also felt a difference. How did you "PE mod" your muffler?
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I cut the top off my muffler and added pipe basically bypassing most of the “muffler” part of the muffler so instead of the exhaust gas’s taking many different ways through it. It just enters goes through a straight section of perforated “muffler” than straight to the tips. Basically it turns the stock muffler into a very short glass pack. Overall the sound is actually quite fantastic in my opinion there is a tiny bit of drone but it’s not much. At the time I thought the drone was really bad but later found out it was because the guibo on my driveshaft and just my drive shaft in general was failing so that was 95% of my “drone” and vibration. But before I fixed the driveshaft I switched to the 330i muffler as I couldn’t stand the drone but it wasn’t really the exhaust in the first place. I would say the PE mod is just a less raspy muffler delete so if your cat less etc or not stock exhaust, You may find it a touch loud.