ok iv called myself looking for exhaust questions on the forum but most iv foudn was for a gas motor. i was wondering whats a good exhaust to run on my 6.7. i was looking at banks but they havnt come out with anything yet. i have seen a few ppls sigs with a 6.7 where they cut the mufflor off and had a straight pipe from the cat back. i was curious if i could do this and put a Y in there after the cat and run duals out the back. i love the dual pipes but if i cant do nothin but a single that would be kool. i believe my stock is a 4" exhaust so im looking at gettin a 4" buta 5", but not sure if i can put a Y and then run the 5" pipe behind that. anywayz any help would be nice. also i do plan on running other stuff like program, intake, all that good stuff. so hopefully a 5" wouldnt be to bad to have. thanks

 

Your kinda limited for exhaust cause of the DPF, I think your best bet would be cut the muffler out and put a chunk of pipe in there. IMO dual exhaust is strange on a oil burner unless they are stacks.

 

Maybe BksRam or somebody with a 6.7 would have another idea for exhaust

 

realy themost you can do is a cat back if you want duals. if you do remove the muffler dont be surprised if you dont hear any difference due to the DPF and the CAT.

 

MBRP makes an exhaust for the 6.7's.