The M3 is powered by a high-revving 4.0-liter V8 engine that produces 414 horsepower. All that power is driven through the rear wheels via two different transmissions, a six-speed manual or a seven-speed double-clutch, and a variable differential lock. High-performance anti-lock brakes with cross-drilled discs work with electronic stability control and M sport suspension to keep things under control. Available options include electronic damping control, 19-inch forged alloy wheels, navigation system, heated seats, various dash trim choices such as aluminum, wood or leather, BMW Assist, satellite radio, USB audio adapter and park distance control. For 2011, LED taillights have been added to the coupe and convertible, and a new Competition Package is available.