honestly if you want the sound just throw a thrush muffler on i did it to my 4.7 dakota and it sounded better than all of my friends w/ catbacks (minus my friend w/ a hemi) it cost around 60 buck for the muffler clamps and some flexpipe. I plan on doing the same w/ my RAM then custom creating a dual side dump out.
[SIGPIC] RIP 02 4.7 Dakota sport qc 4x4
RIP 05 Ram 4.7 rc 4x4
HELLO 12 Ram HEMI qc 4x4 and 94XJ