This version is meant for 4WD/4x4 trucks. A version for RWD/4x2 trucks is here. You can technically install the 4WD version of this kit on an RWD truck, just be aware that you will get slightly more ride height out of the front strut assemblies than what they're rated for on the 4WD trucks, and we strongly recommend using a 1.5" rear block or a take-off 4WD rear block so that the shocks are in a more optimal travel range.