just wondering who has a high flow catalytic converter and how much did it help with performance???
i have a y pipe and a catback exhaust and was just wondering if one of these would help the whole system?

 

There are plenty of other places to research this other than starting a new thread.

However, I will tell you this right now:

Don't get a high flow cat! They are worthless.
They don't add any hp!
Just keep your stock cat and save $85!