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      11-03-2012, 09:47 PM   #14
N0OS3
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Drives: E90
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Quote:
Originally Posted by Johnny D View Post
The X pipe should go as close to the front section of the exhaust as possible. Let me reword that...The X pipe should go directly after the final collection point of the exhaust.

I personally will be running a magnaflow X pipe resonator in the section before the secondary cats.
why close to the front?

I'm running an H-pipe though... from the multiple threads and articles i've read into, you keep the deep tone from an H-pipe without a lot of raspy effect.