Hello again everyone,thought I would post this here since it applies specifically to the motor. I just picked up my new 2011 6.7 I plan on doing the DPF and NOX delete along with the muffler but leaving the Cat. I had the same setup on my 06 5.9 and i loved the sound, throaty but not overly loud. I dont plan on adding more than the H&S tuner since this is primarily my work truck. Anyone else running a similiar setup on thier trucks? Any forseeable issues with leaving it on?