Besides his voice and cool faceplate, Optimus Prime's most distinctive feature ... he would take the form of a 1992 Peterbilt 379 semi-truck, decked out in some pretty slick hot rod flame decals.

Barrett-Jackson will sell the Optimus Prime Peterbilt and Michael Bay's 1967 ... auctioning Optimus Prime® (Lot #1325.1), the iconic truck featured in the first three Transformers™ films ...

NASCAR team owner Rick Hendrick also went and got himself Optimus Prime, a custom 1979 Peterbilt truck used in the Transformers movie. Hendrick paid $110,000 for the custom truck, which can do ...