Since 1989, JKS Manufacturing has developed some of the world?s most widely used and respected products for Jeep vehicles. It all started when we pioneered the original Quick Disconnect brand of quick-release sway bar disconnects. Since then our product range has expanded to include such favorites as the ACOS line of height-adjustable coil spring spacers, and perhaps our most advanced creation to date, J-Spec Suspension systems including the JK Front Coilover Conversion.