i got a 2001 ram 5.9L it has catts, muffler, 2 1/2 single to y pipe into 2 1/4 over the axl s, i would like it really loud so im thinkin on doing catt back true dual from manifolds all the way back with 2 1/4 with 2 1/2 over the axles, but i dont know how it will sound or throw codes, any one...