I purchased Dirt King's 4130 upper control arms from Hotshot Offroad for my 2020 Tacoma. They came fully assembled, and the instructions were easy to follow. The best part being, I was able to easily install these UCAs without having to bend or damage any sheetmetal in my wheel well. Other UCAs instruct you to bend pinch welds out of the way and paint the marred metal to prevent rust so that the UCA pivot bolt can be reused. Not Dirt King. By including new pivot bolts in the kit, Dirt King thought of everything for a clean, damage-free install. Cutting the bolt heads of the original pivot bolts was easy and prevented me from doing permanent damage to my truck. I appreciate this level of attention to detail. I would definitely do business with Dirt King again. Also, big shout out to Hotshot Offroad and Colton H. for helping me pull my order together.