I have no issues with the factory rear leaf packs, in fact, I am impressed that I can load up 2,500 pounds in the bed and the truck handled it, GREAT
The Timbrens are just an added level of safety, to help the truck handled those heavy loads
I pulled a Lake Michigan Deep-V fishing boat a few weeks ago, roughly 5800 pounds on a dual axle trailer..........barely sagged
Spending $1300 new leaves is not in my plan.......totally unnecessary, for me
Next on the plan, is to delete the tailgate pole with a patch panel, remove the factory bedliner, and have LineX sprayed