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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > DP rasp?



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      03-16-2016, 05:39 AM   #1
frenchie1013
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DP rasp?

I just installed Downpipes and have some crazy rasp it actually sounds awful to almost embarrassing to me. I have a stock exhaust and have heard (YouTube only) other Downpipes with stock exhaust and they and much better. Any ideas on what this could be ?
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      03-16-2016, 05:41 AM   #2
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Quote:
Originally Posted by frenchie1013 View Post
I just installed Downpipes and have some crazy rasp it actually sounds awful to almost embarrassing to me. I have a stock exhaust and have heard (YouTube only) other Downpipes with stock exhaust and they and much better. Any ideas on what this could be ?
Make sure the downpipes aren't touching the heat shield material underneath, or the subframe. That can cause some pretty awful noises that could be mistaken for rasp
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      03-16-2016, 06:15 AM   #3
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Quote:
Originally Posted by madmantwo
Quote:
Originally Posted by frenchie1013 View Post
I just installed Downpipes and have some crazy rasp it actually sounds awful to almost embarrassing to me. I have a stock exhaust and have heard (YouTube only) other Downpipes with stock exhaust and they and much better. Any ideas on what this could be ?
Make sure the downpipes aren't touching the heat shield material underneath, or the subframe. That can cause some pretty awful noises that could be mistaken for rasp
I'll give that a shot. Thx
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      03-16-2016, 01:28 PM   #4
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Exhaust leak? There shouldn't be rasp with a stock exhaust. So as the other poster said, check your install to make sure nothing is touching (or leaking). I had a small leak at the rear v-band. Didn't cause a rasp, but you could hear the exhaust leak.
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