Max Wade was found guilty of attempted murder, vehicle theft and other crimes. He was under 18 when the crimes were committed but he was charged as an adult.
Wade was found guilty of committing a 2012 drive-by shooting in Mill Valley in which he fired at two acquaintances in a fit of jealousy over one dating the other.
The shooting investigation led police to Wade's storage locker, where they discovered Guy Fieri's $200,000 Lamborghini. The car was stolen in 2011 from a San Francisco dealership after the thief climbed in through a high window.
Wade was separately sentenced to 21 years and four months in prison. He does have the possibility of parole.
Fieri is best known for his Food Network show "Diners, Drive-Ins and Dives."
The Associated Press contributed to this report.