2007 Ford Shelby GT500 officially rated at 500 hp

Final certification testing of the Shelby GT500's 5.4-liter supercharged V-8 shows it will produce 500 horsepower and 480 lb.-ft. of torque -- 25 more horsepower than original estimates. The 500 hp rating was obtained using the Society of Automotive Engineer's latest standard and was witnessed by an objective third party. The right to purchase the first 2007 Ford Shelby GT500 was auctioned for $600,000, with the proceeds benefiting the Carroll Shelby Children's Foundation. The 2007 Ford Shelby GT500 goes on sale this summer. See our full report on the GT500 here.