The Fast And The Furious star Paul Walker has signed on to narrate new Imax film Air Racers 3D. The movie, which hits theatres in April (12), will explore the world of air show entertainment and aviation racing. He says, "I have always been fascinated by the sheer power, precision and skills of these tremendously talented pilots who race just 50 feet off the ground at twice the speed of a Nascar race."