The Front Weight Jack Kit is a direct replacement assembly for standard front springs. No cutting or modifying is required and it allows independent front corner height adjustment as well as front corner weight tuning. The kit uses a threaded jack bolt that is turned with a 1/2" ratchet extension from the bottom side of the lower control arm. The jack bolt articulates on an aircraft-grade monoball mounted in a billet aluminum frame cup to provide smooth, precise articulation throughout suspension travel. The kit includes custom springs with a billet spring perch. This corner weight system offers more inner tire clearance vs. a traditional coilover system on your 1982-1992 F-Body. Spring Rate: 950lbs/inSpring Free Length: 8in