Our brand new 1963-82 Chevy Corvette Tubular upper control arms are designed for the performance enthusiast.These control arms are made to exact specifications and use 1020 DOM tubing. We have designed an extra 4.0 degrees of caster into the arm for greater high speed stability and performance. This offers better overall performance of both driver and vehicle. Poly urethane bushings are used forless deflection and help maintain alignment settings. Factory cross shafts recommended.