"Duff has a lot of steam to blow off, especially considering he's a diesel. He spends most of his time working out, pulling rigs at the gym, and practicing tough guy comebacks to himself in the mirror, but when faced with actual conflict, he's as shy as a 4-cylinder."
- Duff has been released in the Cars Die-Cast Line.
- Duff's license plate number is 26M3L, according to his die-cast model.
- Duff is a 2000 Equaliser Mule.
- ↑ "Cars Finder" (supplementary material on Blu Ray Disc release of Cars). 2007. Blu Ray Disc. Walt Disney Home Entertainment, 2007.