Overview This is the adjustable track arm that replaces the factory part that is approximately 27-inches Long. Fits all Fits 1963 & early 1964 trucks that used the longer track arm. This track arm includes polyurethane bushings for a firmer and sportier ride, and is adjustable so that you can center the rear axle when the ride height is changed. Yellow zinc plated finish. Compatible with 1963-1964 Chevrolet/GMC C10/C15 & Suburban (RWD) Features Adjustable track bar Approximate length - 27-inches - fits trucks that use the longer track arm - later trucks used 23.5-inch track arm Zinc plated finish - for corrosion protection Polyurethane busings for a sporty and firm ride Adjustable - allows you to center rear axle when ride height is changed Fits trucks with trailing arms and coil spring rear suspension only