The cars of Transformers 4

"Transformers 4" filming is underway and apparently the team has been to the body shop since the beating it took in the last film, picking up a few new faces along the way. (Paramount Pictures)

Optimus Prime's Western Star semi is getting an aerodynamic update, a six pack of smoke stack-style exhaust pipes and more chrome than the 1950's. (Paramount Pictures)

Bumblebee is going retro and toning down the yellow as he transforms into a modified 1967 Chevrolet Camaro SS. But one custom car builder isn't too pleased, suggesting Michael Bay's team <a href="http://jalopnik.com/did-transformers-4-rip-off-this-guys-design-for-the-ne-510655228">ripped off his original design</a>, which of course doesn't include the ability to turn into an anthropomorphic robot. (Paramount Pictures)

Hound was originally designed after Mitsubishi's version of the classic "dogface" Willys Jeep, but is taking on the form of an Oshkosh Defense Medium Tactical Vehicle to keep up with the Transformers arms race. (Paramount Pictures)

No word on what character the seventh-generation Corvette will play in the film, but its interesting to note that the design of the all-new coupe was influenced by the 2009 Corvette Stingray Centennial concept, which played the role of Sideswipe in the second and third installments of the Transformers franchise. (Paramount Pictures)

Back in the cartoon days, Sideswipe was usually a Lamborghini. Could this slightly modified Aventador mark a transformation, or is it his formerly twin brother, Sunstreaker? (Paramount Pictures)

Autobot cars are usually GM products, so there's a good chance this Bugatti Grand Sport Vitesse is one of the bad guys. Either that or the film's human star, Mark Wahlberg, just wants to save the planet in high style. (Paramount Pictures)

Putting the "rally" in "rally sport" this Chevrolet Sonic RS definitely looks ready for trouble. We have no idea who Shane is, but we do know that he has A+ blood, so it's a fair bet they'll be a human behind the wheel of this one. (Paramount Pictures)

The $1.5 million, 230 mph Pagani Huayra is one of the few cars on the planet that can upstage the Bugatti Veyron. It's also proof that Michael Bay doesn't pinch pennies. (Paramount Picture)

Michael Bay calls this 2014 Freightliner Argosy "imposing," but hasn't yet said what its role in the movie is. Speculation pins it as either Optimus Prime's brother, Ultra Magnus, or possibly the Decepticon Motormaster, given its sinister look. (Paramount Pictures)