Moog K5263 Ball Joint Problem Solver powdered metal gusher bearing design enables grease to flow through the bearing to the stud for reduced friction and enhanced strength and stability. Problem Solver patented cover plate design allows for tighter tolerances vs. traditional cover plate designs, providing a more durable and extended life part. Exclusive cover plate protects against contaminants leaking into the bearing surface. Belleville washer preload provides lower torque and stud articulation with minimal axial clearance. A flange style sealed boot equipped with special grease relief valve to prevent contamination. Loose or worn chassis parts can lead to premature tire wear Fits 1980 - 1996 GM vehicles Ball joint is greasable Dust boots included Improves chassis performance and durability Designed as stock replacement