i have final made up my mind on what exhaust i want (finally tax return time). I am looking at Diamond Eye T409 Ss 5" down-pipe back straight pipe exhaust. Now i was reading about DPF and i was wondering where are they located on my truck? I then was told 2 different stories; first story the guy told me it was illegal to take it out and would not show me, and the second story is another guy told me my LBZ doesn't have one, they started putting them on all 2007 diesels and up. Anyone know the truth if my truck does have one? Also if i put in that exhaust i am looking at buying will i have any codes pop up?