I will be running a drag3 kit w/ 2 1/2" downpipe. I want to get the 2 1/2" Carsound cat on second though I am going to get the Carsound cat, the thing is my exhaust is 60mm ( 2.3something something inches). Will this create a bottle neck or should I be fine?? Is there even place online where I can get a carsound cat that is 2 1/2" in and 60mm out? Oh and no I will not get a new exhaust, I am broke.