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      12-11-2012, 08:27 AM   #36
Stan.mac
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Drives: 135i M-Sport
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Quote:
Originally Posted by flzrider View Post
That seems logical, but I would worry that there may be a good reason for having 2 separate pipes and that merging into 1 pipe so close to the turbos may be detrimental.
Agreed; I'm far from a mechanical engineer but I think it would be for closer regulation of back pressure. Not enough and you loose your low-end Tq; too much and you have spooling issues... Though the logical side of me says, two 3' inch pipes = 6" for two small turbos. My personal opinion, formulated from years of tuning, it's over kill. 4" total would be ample to move the exhaust... It's only a 3.0L motor... You might not get the exhaust note that one would dream of but I'm a functionality person... Plus one pipe seems a bit more manageable then two. Just my .02
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