Producer Roger Corman doubled as one of the race drivers, and got so caught up in the race that he forgot he wasn't supposed to "win" it. He wound up beating star John Ireland across the finish line, resulting in another take being shot, in which Ireland won the race.
In his autobiography, producer Roger Corman states that the film was shot in nine days at a cost of $50,000.
The title rights, not the story rights, to this film were purchased so that the title could be used on The Fast and the Furious (2001), another film about racing.
The race sequence uses stock footage of actual road races that were held in Pebble Beach, CA, along with new racing scenes filmed for the movie.
Connie's car is a Jaguar XK120 roadster.