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      02-06-2015, 11:58 AM   #5
Mike_L
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Drives: 2015 335xi GT M-Sport MPPK
Join Date: Jun 2013
Location: New York City

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Quote:
Originally Posted by f30luxline View Post
There are catted DP's but why? I never understood the development of high flow cats. I don't see a performance improvement being significant enough to justify. I agree with the points stated by bahasad.

I've heard Co2 spacers work for not causing any codes. I assume the aFe doesn't delete codes? This is why I chose the combo of catless ER DP and JB4. No codes or emissions issues.
Performance increases more than enough to justify. Plus you stay legal with no risk of losing your car if you hit an EPA checkpoint. Cats are there for a reason. Removing them is a halfassed way of modding.
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