No but there is no way you are going to brake one. Drew would know the exact specs but I think they are 3/16+ DOM steel. If Mel, Eddie ect can run V8 swaps do king of the hammers ect without braking them you should be just fine. I would worry more about getting into a situation where braking an arm like that is possible. A situation like that would be life threatening and I would be worrying about how solid my roll cage is not my control arms. I would also bet the RK is a heavier kit with the braces, you may need to relocate the tank too. A guy near me with a 2 door had to for his 3 link. If you are into the extra bit of articulation have a custom triangulated 4 link made it will have less squat during acceleration and you may experience rear steer from the tires moving forward and back slightly with the 3 link.