Stewart was entered in the Supercharged Outlaws section in a Hemi-powered Camaro.
No details have been released on how the accident claimed his life.
All further competition has been cancelled for the weekend.
“It is with deep regret that we announce the passing of ANDRA drag racer Chris Stewart.
“Chris Stewart, a second-generation racer was competing at South Coast Raceway.
“All remaining racing has been was cancelled for the weekend.
“The Stewart family have requested privacy during this time and we ask that their wishes be respected.
“On behalf of the Australian National Drag Racing Association we pass on our sincere condolences to the Stewart family, crew and friends.”