Lower Ball Joint Kit. The Turner Performance Products Lower Ball Joint Kit is designed to provide a complete, cost-effective solution for refurbishing a worn lower ball joint, restoring precise steering and suspension performance. Features: Includes all components required to rebuild one lower ball joint. Heavy-duty steel ball joint housing with POM-M90 bearing cup to isolate the steel rod from the case and reduce wear. Offers significant cost savings compared to O.E.M. components. Sold per A-arm and includes snap ring and cotter pin. Notes: Two kits are required per vehicle. Kit contents may vary by fitment, are subject to change and may not match the image shown.