Quote:
Once a Mustang has been converted to front coil-overs, there is no need for a front control arm designed to hold the spring, and therefore the weight of the car, in the center of its span. When the spring is no longer located on the control arm, the design requirements for the arm change, allowing for a much lighter weight control arm.
Stock Ford arms weigh 14-3/4 lbs. each. MM tubular arms weigh 8 pounds each, for a total weight savings of 13-1/2 lb from the control arms alone. Additional weight is saved from the installation of the front coil-over kit.