Fichtner, driving a Scion tC, finished three seconds ahead of second-placed Ken Gushi, a professional Japanese drift racer, after 10 laps of the Long Beach street course. Actor Michael Trucco was placed third, ahead of Muniz.
Green was eighth but showed he's a winner outright when his sexy wife Megan Fox showed up to support her man.
Following the race, modest Fichtner told reporters he was thrilled by the victory, stating, "I didn't even look in the rearview mirror. I just wanted to drive my car. I know there were many drivers in the pack who could've just as easily come out on top."
Gushi spent the duration of the race battling with Fichtner and Trucco after starting 30 seconds behind the stars - the race's traditional handicap for professional drivers. He scored the fastest lap time.
True Blood star Stephen Moyer was forced to pull out of the race after flipping his car during qualifying laps on Friday (15Apr11).
Other celebrities finishing in the top 10 were: Kim Coates and Daniel Goddard.
A charity auction winner called Jerry Westlund finished 10th, ahead of Megyn Price, wrestler Tito Ortiz, pop star Kevin Jonas and Djimon Hounsou.