Speed Racer is the main character from the show of the same name.
He and his father appeared in "The Son Also Draws" just before the soapbox derby. After their argument about Speed racing in a race, Pops confessed he was not really his father, which Speed was shocked to discover. Later they were outside the window, laughing at how the Griffins' going to New York didn't affect them.
He is voiced by Seth MacFarlane.