What do you mean when you say "back half" - muffler and tail pipe?
Dont get excited but, I have an entire 03 exhaust from cc/sb 4x4 6spd that I took off my Cummins - If you have the 555 motor that was made until 04.5 then I am pretty sure it is the same thing, if you have 600 motor then might be different - I was going to put it back on when I sold the truck since it is still like brand new - pm me if interested
sorry bout the 04 part but ya im pretty sure its not the 600. she just has like a 2 and half in pipe on there right now and im worried about getting to hot with her pulling her horse trailer all the time. thanks again
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