Exhaust Question 2001 7.3
Hoping for a little help. I just picked up a 4" turbo back SS Dynomax exhaust and am looking at the exhaust on my truck and trying to determine if it's already been upgraded at some point. What I'm measuring is a 3 1/2" diameter pipe. The down pipe is 3" and about a foot after the down pipe turns 90 to the rear of the truck it transitions to 3 1/2" from there back and does have a muffler in line. Would this have been standard? If not, will I really see much benefit by going to the 4" turbo back I have? Finally, should I just move to a 3 1/2" down pipe and tie in to the existing system? Thanks!