text: Shelby CS6/8 Shelby, along with Paxton, also designed a new variant based on the V6 Mustang. Modifications include a supercharged motor producing , 20-inch wheels bearing the Shelby name and the Cobra badge on each side and the decklid, a 2-inch drop in suspension, Baer/Shelby 14-inch front and rear brakes, an aggressive front fascia and a dual exhaust. Shelby also created the CS8, a 4.6-liter V8 variant of the CS6. The Shelby CS6/8 was not available as a factory release. However, Shelby had made the CS6/8 kit available for purchase. But then the contract with Hertz GT-H came, and only a handful of CS6/8' were built, making them one of the rarest cars ever built by Shelby.
  2006; 2007 Ford Shelby GT-H
  Ford introduced the Shelby GT-H version of the Mustang at the 2006 New York Auto Show. Like the original GT350H from 1966, the GT-H had gold-on-black paint and was only available at the Hertz car rental agency.
  Ford Racing Performance Group provided Shelby its FR1 Power Pack to add 25 horsepower to the existing Mustang GT powertrain with an additional 10 ft-lb of torque. The package included a 90mm cold air kit, muffler kit, a new X-pipe and Ford Racing "GTA" axle-back mufflers. The Ford Shelby GT-H also had the Ford Racing Handling Pack (FR3) which included specially tuned dampers, lowering springs, sway bars, strut tower brace, and a Ford Racing 3.55:1 ratio rear axle assembly.
  A total of 500 cars were built to celebrate the 40th anniversary of the original Shelby GT350H.
  For 2007, a convertible version of the GT-H was offered for rental at Hertz. This time the convertibles came with a custom light bar reminiscent of the 1968 Shelby Mustang convertibles.