Moog CK620319 Control Arm and Ball Joint Assembly New design with pre-installed integral dust boot provides easier installation while still maintaining the same level of performance 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 Available as a separate component, no need to replace the steering knuckle, saving time and money 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 Moog Problem Solver design includes an oversized housing for a more secure fit