Here Kitty, Kitty
- Thread starter FnlApprch
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For me, I already have the headers, and a Borla cat-back. There are two, 2" pipes that come off of your exhuast manifold. It then flows into one, 2" pipe and then back into two seperate 2" cats. I plan to install a 3" Magnaflow cat. I will eliminate the choke point of the single 2" pipe and will be able to install a bun for the 02 sensor as not to throw the CEL. Theoretically it should give more power, and the total operation is less than $250. The shop say if I don't like it it will be about $30 to change it back.
lets not double post
http://www.bmwboard.com/forum/showthread.php?s=&threadid=5586
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http://www.bmwboard.com/forum/showthread.php?s=&threadid=5586
go there to reply
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