The red car was a 1967 Chevy Camaro SS Convertible, and was owned by the now ex-executive producer of the show. In the early days of production, they drove the car. Now it's transported by trailer between the cities Guy visits, and it's only driven between restaurants in the same town. “Newer” episodes (8/11 to present) have been shot with a 1968 Camaro. The '67 was sold.
Guy is a car nut and owns nine at last count, including an '04 GMC Sierra pickup, a ’65 Cobra, a ’96 Impala Super Sport, an '07 Corvette, a '71 Chevelle, a '68 Pontiac Firebird, and a '76 CJ-5 Jeep. Other purchases include a 2008 Lamborghini Gallardo (infamously stolen in March 2011), a yellow Chevy 4500 monster semi truck (as seen in this RITZ Cracker commercial) and a black-on-yellow 2011 Chevy Camaro.