Throughout its history, Kenworth has worked hard to produce quality, durable and innovative products for customers. Kenworth's success can be traced back to a philosophy established at the beginning in 1923: Build a custom truck and build it to last. Back then, it was said that Kenworth engineers weren't afraid to "get their boots muddy" as they journeyed into the field with customers to understand the demands put on their vehicles. This was a critical aspect of designing a Kenworth -- and remains so. Today, Kenworth continues to listen carefully to customer needs, then builds custom trucks that will meet those needs. That's why they call them "The World's Best."