onebadf150
New member
I can't find a solid answer on this one. I run a full 4" deleted on my 6.4l and it runs great, but I see alot of guy's with 6.7l running 5" why is that?
My father's regular cab fx4 that he ordered just came in and he wanted to clean up the exhaust. So on the list was SDP 4" downpipe but what size exhaust to finish out.
pro and cons of 4" and 5" on a 6.7l?
muffler or no muffler?
thanks
Nick
My father's regular cab fx4 that he ordered just came in and he wanted to clean up the exhaust. So on the list was SDP 4" downpipe but what size exhaust to finish out.
pro and cons of 4" and 5" on a 6.7l?
muffler or no muffler?
thanks
Nick