Chalk-Head

The Chalk-Head is Sonic "Boom Boom" Renaldi's T-180. This car is featured at the Grand Prix race from the Speed Racer film, where it tries to stop Speed right at the start, but ends up crashing with another car instead but survives along with the #73 car but are way in the back.

The car's color scheme is coated in math and science equations thus, why it’s named Chalk-Head

The Chalk-Head is playable in Speed Racer The Videogame.

Trivia

 * Chalk-Head's body design is similar to two other known cars featured in the Grand Prix race, the Zoomishi and the car sponsored by Janus Automakers.
 * Chalk-Head and Thistle are both numbered "33".
 * In the files from the Videogame, this vehicle is referred to as "Hyperion".