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Ever since it's initial release in 1968, the Ford Mustang Mach 1 has been blowing past the competition and setting the standard for what a high-powered performance vehicle should be. But even legends like the Mach 1 Mustang can be improved upon to become something truly Lethal. Check out performance parts and accessories for the 2003-2004 Mach 1 Mustang now! Lethal Performance can make your Mach 1 supersonic on and off the track.