Van@RevanRacing
Active Member
I'm going to stick with the stock manifolds for now, buy an off road H pipe, and have the green cats welded in place. If my exhaust shop puts them in the same spot as the OEM cats I don't think there will be any issues, but only time will tell.
bluesnake263 for what it is worth my car picked up an additional 6 RWHP with an off road H versus the OEM Cats and H-Pipe.
Ford put a very good quality high flow catalytic converter on our cars from the factory. Which is one of the many reasons why ALMOST every aftermarket tune for 2013+ GT500's with stock exhaust still has the COT strategy turned on.