The 2005 Porsche Carrera GT was driven by Roger Rodas, who was killed by the impact alone, according to the autopsy released by the Los Angeles County coroner's office. Rodas suffered from multiple traumatic injuries. Both deaths have been ruled as accidents by the coroner.
Results of toxicology testing will take another six to eight weeks.
Walker starred in all but one of the six "Fast & Furious" blockbuster films that glorified fast cars and dangerous driving.
Meanwhile, Universal Pictures announced that it has shut down production for an unspecified time on "Fast & Furious 7."
The seventh installment of the street racings series started shooting in September and was on break for the Thanksgiving holiday.