After losing to the 405 during the last Mega Race, Richard Rawlings wants a rematch and goes after Ryan Martin; the "Misfit Garage" guys call out Farmtruck and AZN for a race of their own, during which they each build a new car.

The Gas Monkey crew works hard to make sure their chassis will allow the car to drive straight. But bad weather stops them from making good test passes.

An argument stalls the Misfit's build; Farmtruck and AZN work on transforming the Gonorail into a working car; Farmtruck, AZN and the Misfits complete their builds, but the teams struggle with technical issues; Ryan and the 405 arrive in Phoenix.

With their builds complete, Farmtruck, AZN and the Misfits make some pre-race test runs. But both teams struggle with technical issues that must be fixed.

The time for Mega Race 2 arrives, and the racers from "Fast N' Loud" and "Misfit Garage" join the show's racers in Arizona for the big event; the guys do anything to win in the battle between Oklahoma and Texas.