TA Performance Valve Spring Retainers eliminate dropped valves due to retainer failure and they provide your engine with maximum valve train protection. They are magna flux inspected and black oxided for appearance. Perfect for both street or strip. These retainers provide a positive hold that controls the valve spring from sliding around the retainer, especially at higher RPM’s and higher spring loads where the added stress can cause increased valve, guide and retainer wear, poor sealing, increased oil consumption, improper valve seating and broken springs. Protect your Buick with the best retainer available. Sold in sets of 12.