1968-72 GM A-body , , , , , and all other GM A-body Rear factory reinforcement frame tie braces, 2pc Phosphate. These were installed the factory on all 4 speed cars and can be used on automatic cars. They control wheel hop. They bolt between the upper and lower control arms. They are easy add on to get more traction out of your car. This is inline tube exact reproduction of the original, They are the correct size and shape with the correct phosphate finish. Replacement for: 1968-72 GM A-body / / / 1970-72 , 69-72 1968-72 .