Hmmm I recently towed a 6x12 u-haul which was about 3800lbs w/ furniature in it. My truck was stock then and I only had a tiny bit of sag.That's Awesome man!!! I had to use a weight distribution hitch when I hauled my 6X12 Enclosed trailer. Usually had 2 quads in there. Made my truck sag pretty good. Hitch straightened it right up though! Rode alot better too.
For some reason, I like towin shit. Don't know why? That's why I haven't taken my hitch off yet. Just in case...........