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      02-07-2013, 06:37 AM   #1
nicktyler
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United Kingdom
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Drives: 335i (sadly gone)
Join Date: Jan 2012
Location: Essex

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How much of the exhaust should I replace?

Hi

I have the noisy flap on cold start in my car and I'm wondering if anybody knows exactly where it is. I'm thinking on replacing the whole exhaust from downpipes as I am getting the turbos rebuilt but I don't know if a back box is enough to remove the flap. I don't really want to have to replace the full system including secondary cats but if most of the back needs to be replaced it might not cost much more to go the whole hog.

Cheers

Nick