Though limited, there are a few options available with the Shelby GT500. The standard 500-watt sound system can be dropped to make room for the so-called Shaker1000 that adds an iPod jack, dual subwoofers, and ad you might’ve presumed, 1000 watts of eardrum-busting power. Sirius satellite radio is also available for serious audiophiles and/or Howard Stern fans. Lastly, Ford offers a GT500 Premium Interior Trim package with an automatic dimming interior rearview mirror, a compass, alloy pedals, and upgraded trim and stitching on the console, doors, and instrument panel.