The Trilogy Of Tough Is Now Complete

Born from the driver’s need for increased efficiency, safety, and comfort. Purpose-built to redefine what a highway truck should be.

Introducing the 57X, the newest member of the Western Star X-Series family and the most advanced and driver-focused highway truck we’ve ever built.

Built on a history of toughness and equipped with technology, comfort, safety and efficiency that rewards you every time you get behind the wheel and when you check your bottom line

Learn More About the Western Star 57X

Western Star 57X

State-Of-The-Art Safety

Active Brake Assist 5

Active Brake Assist 5 detects distance and speed to moving and stationary objects in its path and determines if braking is necessary. It’s the only system on the market that works down to 5 MPH.

Active Brake Assist 5

Adaptive Cruise Control

Detroit Assurance technology enables state-of-the-art features such as Adaptive Cruise Control to 0 MPH to ease driving in stop-and-go traffic, as well as help mitigate front and rear collisions.

Adaptive Cruise Control

Brake Hold Mode

Whether stopped in heavy traffic or for any other reason, this state-of-the-art feature can keep a truck* stopped when the driver removes their foot from the brake.


Brake Hold Mode

Available Engines

Detroit DD13 Gen 5

The DD13 Gen 5 engine offers the best of the best in cutting-edge diesel engine technology and engineering. It's been significantly redesigned with vocational jobs in mind, with numerous innovations to increase performance, durability and productivity.


Detroit DD15 Gen 5

Backed by years of proven performance, the Detroit DD15 Gen 5 takes reliability, durability and productivity to the next level. Perfect for any operation, vocational or on-highway, the DD15 delivers everything you need from an engine, including greater profitability.


Detroit DD16

The biggest, toughest and most powerful engine Detroit has ever produced, the DD16® is the only 16-liter engine available. And since it offers the longest service intervals in the industry, it tackles your hardest jobs while increasing uptime and profitability.