4-feet from the frame is a little different from 4-feet saved. After removing bumpers and brackets, you still have a grill and a rear bed (both of which overhang the frame).

Phil,

look at this and do your own estimating.

Other factory drawings show that 5" are saved by not having a rear bumper nor rear bumper-brackets (191 5/16 with a front bumper and no rear bumper).

Tim