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      03-18-2014, 08:11 PM   #298
Yeineken
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Drives: '11 135i M Sport
Join Date: Dec 2013
Location: Delmarva Peninsula

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Quote:
Originally Posted by csow View Post
Ok so I've been thinking about doing this. The other day in an underground garage I fired the car, got out, melt down and pinched the pipe closed as if there was a zip tie to see if I could hear the flap and there be any difference.

I heard no difference at all. Does the hose have to be blocked while the engine is off?
No you can do this with the engine on. Make sure you pinch it good. I just did this the other day and had to flex and wiggle my hose around to get it to pinch correctly. Its not a really noticeable difference in sound. I have PPK 1 and with this easy mod she really growls... but cant give you feedback on how it sounds without PPK 1.
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