This crossmember is designed for 2WD 1/2-ton trucks that have been lowered 4-inches or more, and have the rear trailing arm and rear coil spring rear suspension. This part increases ground clearance on your lowered truck. Anti-squat bolt-on mounts allow for the use of 5 different trailing arm settings. The lower hole is for factory trailing arm position, and is adjustable for up to 4 degrees of anti squat allowing more drive off of corners for better performance. Designed for shortbed applications with one-piece driveshafts. Long bed trucks can also use this part, but will require modifications to drill and mount the factory carrier bearing for the driveshaft.