Circuit Sports Mazda Miata NA/NB adjustable tubular front upper control arms is a direct
replacement of the factory unit. These arms are designed to resists flexing with its tubular
design to withstand the stress under load. They include a sliding ball joint allowing enthusiast to
fully adjust the front camber +/- 4 degrees to carefully tune the vehicle to increase steering
efforts, improvements in high-speed stability, and cornering effectiveness. The new FUCA uses
a Teflon spherical Heim joint with steel spacers to replace stock rubber bushings to guarantee
long lasting quality and allow your suspension to move freely yet precisely to ensure controlled
suspension movement that you would require in competitive driving.