UMI's complete kit upgrades the lower control arms and panhard bar with heavy duty tubular components. These replacements are designed to minimize wheel hop, improve cornering, lower ET's, and enhance track consistency. The panhard bar increases rear stability and controls side movement, while the control arms reduce wheel hop and improve straight line traction. Both components are made of mild steel tubing with CNC machined ends and polyurethane bushings for durability and performance.