SPL 370Z Front Upper Control Arms (FUA) for the Nissan 370Z and Infiniti G37 are designed with dual chassis mount adjusters, providing camber and caster adjustment while remaining fully attached to the car. The revolutionary slotted arm design does away with the need for bulky, hard to reach jam nuts. Simply turn the hex cap Double Adjusters to set the arms to their desired length, and then lock your alignment settings in place with an allen wrench. The time saved on the alignment rack can now be spent in the driver's seat! The fully encapsulated spherical bearing that mounts to the upright provides superior strength and negates the worry of rod end bending commonly found in other designs. The wide adjustment range provides camber gain for racers wanting to maximize grip on the track, and camber correction for lowered street vehicles