Important Note: With Round ABS Connector Only. Will NOT Fit with Square ABS Connector Approved Performance Wheel Hub Assemblies feature superior design and construction and problem-solving innovation. They are engineered to last longer, improve vehicle control, provide a smoother ride, and install easily. These bearings are lubricated, sealed and complete with hub assembly. They provide tight fit to the wheels and transmit power without slipping. These hub assemblies are maintenance free, easy to install and increase product reliability while enhancing performance.