The Schley Products Cup Kit For 2500/3500 GM Trucks, No. 18100-GM, is designed for 2000 to 2010 GM 2500 and 3500 pickup trucks equipped with steel lower A-arms. The kit includes four cups: two for removal and two for installation. The cups are precision machined from alloy steel and heat-treated for strength and durability. They are easy to install and remove, and simply lock in place with Schley's proprietary design.