PartsW 8 Pc Suspension Kit for Ford Expedition/Upper Control Arms & Lower Ball Joints, Inner & Outer Tie Rod Ends Advanced corrosion protection against the harshest conditions / Precision-made performance and additional strength Designed with PREMIUM quality materials for exceptional performance, reliability and peace of mind Dust boot is re-installed and permanently attached to reduce contamination, and increase durability and service life Premium alloy steel stud for strength and durability / Replacement improves handling and noise Restores proper balance and Promotes longer shock life / Undergo impact, wear, and fatigue testing to help ensure quality and durability