Our 1971 - 1987 Chevrolet and GMC 1/2 ton pickup truck tubular control arm sets are designed to add 5 degrees of caster while providing full wheel travel and minimal friction possible. The billet 4140 alloy steel cross shafts and sleeves are zinc plated for lasting performance. Simple bolt-in installation with no modification required. They work with all factory and replacement power steering systems, and with or without our o.e. bump stops. All control arms are powder coated gloss black. ball joints included.