I also have the RK 4.5” lift on a 21 JTR and really like it. I easily got 5”+ but I also do not have any additional weight, I have stock plastic bumpers and no bed rack. Took it out on Rausch Creek over Memorial Day with 37s and had zero issues, articulation on the trail/rocks was incredible and...
I have McGard lug nuts that are quality and they sell them in black. I do not have the black ones though so I’m not sure how well that particular style holds up.
https://www.summitracing.com/parts/mcg-64074
I have the Rock Krawler 4.5” Pro-X No Limits kit and once I dialed in the caster it rides like stock on 37 MTs as a daily driver. I should note I do not have the coilovers I just have the RK shocks and I don’t think I’ll be disappointed by the articulation but the first trail ride since...
Not sure If it will apply but I know a JLU owner that had to reinforce the frame side track bar bolt hole as the threads from the bolt wallowed out the hole a few MM which allowed play/movement at that connection. I do not know if it made a noise or how it was discovered but it may be another...