Quote Originally Posted by 97C28O View Post
Chim, there will be no high flow cat that will allow you to pass smog. OEM or nothing at all, the smell without one can be fixed with a high flow cat but it won't eliminate the smell.

and yea for the i6, low RPM is massively loud and the noise isn't what a MB is suppose to sound like..
Are you sure? I think high flow cats still allow you to pass emissions test. If they didn't pass emissions then muffler shops wouldn't sell them since it would be illegal to have. Unless you know something that I don't or I'm wrong