One of the first available is the Shelby Suspension Kit for ’07-’08 GT500s. It includes a combination of Eibach and SPP-engineered components to create the perfect GT500 set-up. SPP also offers separate dampers for ’05-’09 Mustang GTs and Shelby GT500s, Pro-Kit springs for GT500s, and Pro Street-S damper and spring combination for GT500s. Sway bars, end links, rear control arms, and panhard bars are also available.