Pontiac's reborn muscle car gets more power for 2005. GTO is based on a car built by Holden, GM's Australian branch, and is offered only as a midsize coupe. A modified Chevrolet Corvette V8, now up from 5.7-to 6.0-liters and 350 to 400 horsepower, drives the GTO's rear wheels via a 4-speed automatic transmission or an available 6-speed manual. Antilock 4-wheel disc brakes, traction control, and a limited-slip differential are standard. Performance tires with 17-inch wheels are the only wheel-tire combination. GTO seats four and comes with leather upholstery, in-dash CD changer, and remote keyless entry. Side airbags, sunroof, and antiskid system are unavailable. New for '05 is a standard hood with twin open air scoops. Pontiac says the scoops provide engine cooling, but no performance advantage. A scoopless hood is a no-cost option.