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Old 11-17-2010, 02:57 PM   #7
Drives: 2008 M3 ESS Supercharged 650Hp
Join Date: Jan 2010
Location: Leander, Tx
Posts: 500
Originally Posted by TornadoSS View Post
I personally run ARH headers but Kooks are another good choice. Headers would possibly be a sticking point with your dealer. Borla headers are off road type only and do not have cats. In order for you to not have a check engine light on all the time you would need to tune the ECM for the headers with out cats and turn the rear O2 sensors off, that will most definitly void your warranty. Even if you put headers on WITH cats most likely the CEL will come on and ECM would need a tune. Headers with an ECM tune are well worth the money.
Any way I could possibly hear your car
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