Has anyone installed H&S' complete 5" exhaust? I am curious mainly about the down pipe. I have heard/ understand there is a catalytic converter inside my stock down pipe. Is there any way I can remove the catalytic converter from my stock down pipe? Will I really notice a difference in sound and /or performance using the 5" complete system versus their much less expensive dpf delete kit? 5" 700.00 vs. dpf delete 349.00 If its loud, stinks, or smokes, I gotta have it.