Rancho Control Arms are available with heavy duty, .188 DOM wall tubing and forged ends construction with D2 high articulation, grease-free, self-centering bushings for extra durability. The control arms are designed to work on a range from stock to 4-inches. They also allow caster and pinion angle adjustments. This guarantees better ride quality, especially when off-roading. Thanks to the D2 bushings, the NVH (noise, vibration, and harshness) will be significantly decreased for more convenient driving.