Ok, at some point I will need to replace my cat. Does anybody know anything about high flow cats and their legality (I'd like to match a high flow cat with an aftermarket cat-back exhaust for efficiency)? I live in VA and we have emissions standards so I can't get too crazy. I've heard that some are 50 state CARB legal, while others are not. Does anyone have any info on cats that are 50 state CARB legal?
I'm sure someone is going to say 'Get one off an M3 from eBay'. How is the M cat different from the cat on a 328is?
<span style='color:green'>Nobody likes you.</span><img src='http://www.bmw-forums.com/forum/html/emoticons/ph34r.gif' border='0' alt='user posted image' />
<span style='color:green'>Are you experienced, little girl? I want to know what goes on in your little girl world.</span>
<span style='color:green'>I'm the man! I'm bad, I'm so bad I should be in detention. I'm the man!!!</span>