We live in a very small town but I still don't know everyone. Today I did see my first Superduty with a 5" exhaust. I gotta track him down and see how that fits. I knew mine was close but never heard any rubbing. I was washing it one day and noticed oil on the shock. I crawled under only to find a hole worn in the shock. I just losened the u-bolt for the shock mount and moved it over 2" and put 2 tack welds on the bracket. There is a centering pin welded on the axle and it doesn't move with bracket. Another thing you can do if you decide to raise your truck more after puting all new shocks on is to rotate the mounts around on the axle so you only have to buy longer front shocks.