I have looked at the rr hitch kit and the mopar buy everything separate and emptying every pocket route. Like the price of the rr kit but I'm reluctant on splicing my wire harness due to moisture intrusion. I've heard that the bumper that comes in the rr kit is a mopar part. With that being said could I buy the rr kit and use the mopar wire harness and it be plug and play? Then taking it to the dealer and re flashing the CPU?