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      12-16-2011, 03:42 AM   #58
Cozy
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Drives: E82 135i
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Location: Surrey, England

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Quote:
Originally Posted by theriz View Post
just a dumb question - isnt it not good for our cars to run straight pipes??
dont you need some kind of back pressure
The exhaust turbine in the turbo creates the back pressure, you can pretty much have a straight through pipe from there to the back if you like ...but then you get the sound captured in this video.
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