One of the very few films that show a Cheetah sports car being raced. Bill Thomas' Cheetah was an extremely rare sports car that was designed to compete against Carroll Shelby's Cobra. Additionally, the "Fox Five" was actually a McLaren Elva. Being able to watch these cars in action is almost worth the price of admission.
The pool scene location in "Spinout" uses the same pool location that was used in "Jailhouse Rock" (when Elvis sings "You're So Square" near the end of the film).
Riffing on the similarity of every Elvis movie to every other Elvis movie, a studio executive once quipped: "Why do we bother to give his movies titles--couldn't they just be numbered?"