I know of several who have theirs just drop off right at the muffler on KJs. I ran mine like that for a while. What I don't like is on dusty trails it blows so much dust up from underneath even though the turn down was angled off to the side. Also when in 3 foot of water it really bubbled up!
So now I have it almost to the back bumper again, comes out right about the back edge of the rear tire. With the bottom of the rear bumper cut off it works great
04 Jeep Liberty, 4.25 inch lift, 32 inch Duratracs,4.10s Yukon axles and a bunch of other heavy stuff