Dirkson D'Agostino is a male Capitol Motors Verve XT that is painted light green, and black, with the Trunk Fresh logo painted on his hood. He has the number 34 painted in light green on his doors and roof, and light green rims. who competed in the Piston Cup Racing Series for over ten years. However, once Piston Cup teams realize that next-generation racers are more capable than traditional stock racer. Trunk Fresh fires Dirkson and replaces him with a next generation racer named Steve "Slick" LaPage.
"Dirkson D'Agostino discovered his natural racing talent while working in the graphics department for a small racing outfit. Running errands between buildings, he dodged all kinds of obstacles at insane speeds. One day Dirkson caught the eye of the race shop's owner, who fired the young upstart for what he considered reckless driving in the workplace, and rehired him as one of his pro racers, for what he considered a natural talent on the race track."
In Cars, Dirkson is one of the thirty-six Piston Cup racers that compete in the Dinoco 400 at the Motor Speedway of the South. When Chick Hicks creates a large wreck in hopes of distancing himself from Lightning McQueen, Dirkson is involved in the crash, and receives some light damage. However, he is able to continue racing after a pit stop.
In Cars 3, Dirkson competes in the 2016 Piston Cup season, against the likes of Lightning McQueen, Jackson Storm, and many others. Storm's successful debut influences other Piston Cup teams to consider hiring next-generation racers instead of their old ones. After finishing in 7th place at Copper Canyon Speedway, he becomes one of many traditional racers who are fired and replaced by more powerful cars.
Appearance in Thomas and the Magic Railroad (2019)
Along with several other Piston Cup Racers and characters from other movies, Dirkson makes a cameo appearance when the movie is rewinding back to the beginning.