some of my neighbors have told me that the fine for having a testpipie can go as much as one thousand dollars depending on where you live. EEk......thas why i will go for the hi-flow cat.

That brings me to some more question.

1. If the 2.5 inch inlet cat is 2.5 inch but the header pipe is 2 inch, how will this work?

2. And if the 2.5 inch outlet from cat is 2.5 inches and a catback is 2.25 inches, how will they fit?

Thanks.