Western Star at the 2014 Mid America Trucking Show

A 2014 4700SB 110-BBC "Aero Tractor" in daycab configuration. Estimated sticker price: $115,000

The 6900XD Heavy Haul tractor model with a dry weight of 29,500 lbs. Like it? Well it'll cost you around $250,000.

The 6900XD shown here is a 2014 model sporting a 141-BBC, 600 hp DD16 Detroit engine and an Allison 4700 RDS automatic transmission.

The 4900 dump truck model shown here is fired by a 505 hp DD15 Detroit engine, sports a 123-BBC, 256-in. wheelbase, and costs roughly $175,000.

The 4900 EX "Design Our Star" tractor; a completely customized tractor built on the recommendations submitted by Western Star truck fans. It sports an 82-in. ultra high roof Stratosphere sleeper, 600 hp DD16 Detroit engine, and comes with a sticker price of $155,000.

This one-of-a-kind 4900 EX, with a dry weight of 19,200 lbs., sports a completely customized interior, paint job, and chrome accents.

The big daddy at the West Star booth: the Optimus Prime big rig, loosely based on the soon-to-be-released all-new 2015 model 5700 highway tractor.

The leader of the "Autobots" from the planet Cybertron in the famous "Transformer" movie series, the 126-in. BBC Optimus Prime tractor is powered by a DD15 Detroit engine, sports a 54-in. high roof Stratosphere sleeper, Eaton 10-speed manual, and is decidedly not for sale.

The Optimus Prime tractor is equipped with dual 150 gallon fuel tanks and more chrome exhaust stacks than your everyday tractor.

Optimus Prime will again do battle with the nefarious Decepticons in the fourth installment of the move franchise this summer: a film entitled "Transformers: Age of Extinction."

An eye-popping dash is but one of the interior features of the Optimus Prime tractor.

From this angle, you can see how the front hood design blocks part of the forward view. Then again this truck is a movie star, not necessarily a freight hauler.