Quote Originally Posted by Silver GTP View Post
Just to give you a heads up, some high flow cats will trip the P0420 catalyst efficiency code and fail you on emissions if you can't delete it. I put a Magnaflow high flow cat in mine and got the code about 6 weeks later. You should make sure you have a way of taking care of that if it happens.
What do you mean "a way of taking care of that"? I have a scanner that can erase codes, but if they are reoccurring then is this an issue?

Thanks for your input!