Moog Problem Solver design includes an oversized housing for a more secure fit. Suspension & Steering > Steering Linkages > Ball Joint > MOOG-Suspension Ball Joint Moog Problem Solver products incorporate proven design and engineering features for like new steering, ease of installation and longer life. K-6379 | Moog Fuse Kogel - KB USA-Parts 6696 Moog Ball Joint 63-82 UPPER BALL JOINT (MOOG)-45155 Powdered Metal Gusher Bearing Ball Joint Exclusive cover plate protects against contaminants leaking into the bearing surface. 2x Front Lower Ball Joints- K6379 Problem Solver patented cover plate design allows for tighter tolerances vs traditional cover plate designs, providing a more durable and extended life part. 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.