Mike restores a 1968 Beaumont for a charity auction, but scrambles to save the build and the fundraiser when his budget is pulled out from under him; Avery steals a Rust Bros client with a German-made Unimog, putting his friendship with Mike at risk.

Mike converts a 1957 GMC truck to run on alcohol for a truck-obsessed teenage girl; Avery goes the extra mile, finishing the Unimog for its hard-to-please owner.

Mike sells a Willys Jeep to custom car wizard James West, but the price will be determined by the winner of a drag race; the challenge puts pressure on both shops to produce competition-worthy trucks.

Rust Valley rivals face off in the Shop Truck Challenge; Mike struggles to restore a 1971 Chevy Blazer for a wedding day surprise; Avery's plan to repurpose a military truck for music festivals hits a sour note.

A Rust Valley road trip steers Mike into the danger zone after Connor gives him an ultimatum: buy another car and Connor will blow up one from the Field of Dreams.

Old rivalries bring new alliances as Rust Valley's competing shops get ready to face off at the annual Hit-to-Pass race; the cost of Avery's Deuce-and-a-Half music truck spirals out of control.

Rust Valley's auto shops battle it out at the high-impact Hit to Pass drag race. But when one competitor is accused of cheating, the brawl moves from the track to the pit.

Mike and Avery embark on a cross-country road trip, which is interrupted by an unexpected call from home; JF borrows shop space from Mike to restore a 1955 GMC truck and his relationship with his brother.

Mike overhauls a 1955 Belair Wagon in hopes of turning a quick profit, while Avery embarks on an ambitious restoration of a rare 1956 Ford C.O.E. Mike’s betting streak continues.

Connor enlists the Rust Bros on a personal build, while Avery goes over budget on his dream truck. James tackles a project from his past.

Avery struggles to save his business while Mike is determined to end the year on a high note. However, old secrets and conflicts with Connor get in his way.