PartsW 12 Pc Suspension & Steering Kit for Chevrolet GMC Hummer / Avalanche2500 / Sierra2500 / H2 / Upper & Lower Ball Joints, Tie Rod Linkages, Idler and Pitman Arms, Sway Bar End Link Pitman Arm With 3 Grooves / Undergo impact, wear, and fatigue testing to help ensure quality and durability 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