JKS manufactures the best lift kits for your Jeep plus sway bar quick disconnects, track bars, control arms, shocks, coil-overs, tools and accessories. Are you J-Rated? Use the J-Rating™ Terrain Scale to choose best lift kit for your Jeep. Designed, Tested, and Built in the USA. Premium suspension systems featuring FOX Shocks. Suspension Parts. Shocks & Coilovers. Deals. JSPEC Lift Kits.