PartsW 4 Pc Suspension Kit for Cadillac Escalade Chevrolet Express 1500 & 2500 Silverado & Suburban 1500 Tahoe GMC Savana 2500 Sierra 1500 Yukon Front Upper Control Arms & Lower Ball Joints Control Arms Come Pre-Assembled With Ball Joints & Bushings / Replacement improves handling 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 / Undergo impact, wear, and fatigue testing to help ensure quality and durability