The CST Dirt Series Tie Rod Replacement Kit is a full tie rod replacement setup (both sides included) for your GM Truck. CST's heavy duty tie rod assembly increases the strength of your tie rods and they are a full inch thicker than the OE tie rod assemblies. You can use these heavy duty tie rods in conjunction with a CST lift kit or any other manufacturers lift kit like Fabtech, Rancho, Pro Comp, Superlift, RCD etc... The Heavy Duty Center Section is T6061 aluminum, machined in the USA and the forged ends are Manganese Phosphate Coated for weather resistance. There are several of options to choose from when upgrading Chevy/GMC replacement tie rods. This is because the stock tie rod assemblies on these trucks are notoriously weak. CST tie rods are easier to install (no spindle or steering center link modifications required), unlike some of the Heim jointed tie rod kits you will find out there. Heim jointed tie rod replacement kits tend to change the factory pivot locations as well, where the CST Extreme Duty Tie Rod will not alter factory steering pivot locations from stock. This is a must have upgrade, especially for vehicles with 33" or larger tires. The part number for this PAIR of CST Dirt Series Tie Rod Assemblies is CSS-C24-18 and it fits 2011-2018 Chevy Silverado (2500HD Only), GMC Sierra (2500HD Only) models.