Yessir I did, they didn't have time to run new pipe from the headers back so I just had them cut at the Y kinda and run seperate pipes. The muffler has a built in X but I thought it would be better if the X was solid and before the muffler. It feels like it does have a little more pep even with the huge muffler, then again I did go from 1-3" pipe to dual 2.5" pipes.