I have a 04 Chevy Tahoe with a 4-6" RCD suspension lift. The front sags a little. I want ford torsion keys to help level it but I'm afraid to wear out all of the front suspension parts. But the all of the parts have been replaced with moog suspension parts. The shop told the guy I bought it from that the moog parts have a lifetime warranty. If so then I don't have a problem getting the ford keys. Any other solution to leveling it? Or anyone know about moog suspension parts?