I just got a rear bumper with the dual exhaust cut outs for my 09 1500 Quad 4x4 5.7 Hemi. I am looking to add the dual exhaust. I am not sure if an after market exhaust will void my warranty. I am still checking into this.
So either way I am looking into getting a nice sounding system which will let the truck breath and have that mean sound to it. Not too loud but loud enough that you know the Hemi is there.