These arms i picked up unknown brand...was told fireball by a couple people and was told fullflight by some people. Anyways, the lower mounts didnt take oem spec bushings. They had a I.D. of 3/4" got tired of searching for the right bushing and tryed drilling them out got one arm good, the other arm on the other hand drilled off center bad. So now im either going to A. Cut the mounts off and weld in heis joint bungs Or B. Find some junk arms, cut their mounts off and weld them back on these arms.