Rusty's has carefully designed and assembled our kits with spring rate and maximum wheel travel in mind. Doing this you will get a great ride and the most wheel travel possible. Spring rate is determined by how much force it requires to compress the spring one inch. With some of the best prices in the industry there has been no sacrifice in quality or workmanship. Add Rusty's control arms, steering system, and trac-bar for maximum articulation.Kit includes: Front 3" Coil Springs, Rear 3" Coil Springs, HD Rear Trac Bar Bracket, Front Sway Bar Drop Kit, Front Hydro Performance Shocks, Rear Hydro Performance Shocks