With Chief and his guys, Richard Rawlings and the Gas Monkeys, Farmtruck and AZN, and Aaron Kaufman all on the way to California for MegaRace, it's time to take a look back at the struggles they had while building their cars.

Farmtruck and AZN start on their budget build to race Aaron, while Chief and Shawn set out in search of the perfect car. Then, when Chief hears rumors from Texas, he's not sure he wants to build a car.

With only a week left, both race teams feel they might not finish their cars in time. Farmtruck and AZN are scrambling, while Chief and the guys pull every spare part they can find to build their car from the ground up.

With everyone in California, Chief and Richard argue about who will drive their cars, while Farmtruck and AZN have to wait on Aaron. Then, it's time for the drivers to pull to the line and race to see who has what it takes to win.