I posted a few weeks ago about the pacesetter LT header and ory kit from texas speed. Well I bought it and the headers look awesome but the y-pipe is for the 5.3. I ordered on the phone and the guy I spoke with ask what truck it was goin on and I told him '04 2500 6.0, and he said it would fit. Anyways i can send the y-pipe back, my ? is can i just install the headers and custom fit the factory pipe i already have? Or should i do a custom y pipe and aftermarket cats?