Calmax Control Arms frankly were born to solve the wheel clearance problems caused by drop spindles. To get the 4" drop we built a special control arms that is specially designed to work with a engineered 2" drop coil spring, thats why we call this a 4" arm. It is different from our 2" arm CA2555L-2 because the ball joint angles and length are adjusted specifically to work with our 2" drop coil springs.
All of these Calmax Control Arms have new ball joints and urethane bushings installed and are packaged with new swaybar end-links. We have a 2″, 3″, and 4″ model, with the 2″and 3″ arms using the factory coil spring. The 4″ control arm is actually a 2″ drop arm with the ball joint angles and overall length designed to work specifically with our 2″ drop coil spring. What this means is if you want only a 2″ drop use the 2″ arm and if your going to add a 2″ coil spring to get a total of 4″ use the 4″ control arm for best results!
Use with 2" coil spring set CS2351-2
Learn more about Calmax Control Arms at DJM University