Great addition to my 1992 GMC Sonoma 4WD. Raise the stern about 1.25 to 1.5 inches, then fully unscrew the torsion bars and level the front. The stock dampers seem to work well and no extensions are needed for anything else. Best 1.5" lift option on Amazon at $50 for s10/sonoma. Also good technical support. Hex head size 12mm. I recommend the Neiko hex head installed here on Amazon.