An avid car enthusiast, he competed in the Redline Time Attack racing series in which he raced a M3 E92 and was on the AE Performance Team. His car was sponsored by Etnies, Brembo Brakes, Ohlins, Volk, OS Giken, Hankook, Gintani, and Reach Out Worldwide. Walker had been preparing for an auto show prior to his death.
