Helix 1967 Camaro & 1968 - 1974 Nova Upper Control Arm Set Helix is proud to introduce it's new line of CAD designed pre-assembled tubular control arms. NO MODIFICATIONS REQUIRED! These control arms allow for the use of coil overs or airbags. They will fit all air suspension systems, including Helix, QA-1, Afco, and Air Ride Technology. This is a complete set that includes the ball joints, bump stops, and POLYURETHANE control arm bushings. Don't upgrade your stock springs without Helix's exclusive reinforced design! These control arms are specifically designed and reinforced to solve the problem of the increased load on the control arm at the shock attachment points. Other control arms simply can't safely handle the increased pressure of the coil-over shock or airbag assembly as compared to the stock spring assembly. Stay ahead of the pack with Helix Suspension.