Replaces the factory leaf spring at a lower cost than local auto parts stores. Works well for what it's supposed to be. A NOTICE. Check the clearance between the bolts and the frame during installation. I heard a creaking noise that stunned me so much I took it to the mechanic and they said I must have installed something wrong it must be twisted somehow. They claimed to have fixed the problem, but the noise returned shortly after driving. It turned out that the bolts rubbed against the frame, causing a creak. I just gently ran the dremel to the ends of the bolts and cut them very short and haven't heard a single creak since.