Fully-assembled outboard and inboard joints installed on a 4340 chromoly-steel axle bar. Exceeds O.E.M. axle strength and is up to 30% stronger than competitive axles. High-performance molybdenum grease reduces heat and friction. Precision machined for precise O.E.M. fitment. Low-profile stainless steel clamps. Laminate coating resists rust and corrosion. Heavy-duty neoprene boots create a waterproof seal.