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      08-24-2012, 08:13 PM   #25
johanness
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Drives: 2008 Z4MC
Join Date: Aug 2010
Location: Seattle, Vancouver

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Quote:
Originally Posted by DanFromTucson
FYI, coating the headers helps retain heat, which helps with exhaust gas velocity and adds a few horsepower. It also lowers underhood temps as others have mentioned.

Additionally, it helps the cats get up to operating temperature sooner, so it helps with emissions.
Exactly this. Worth the $
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