It's small, light, and have we mentioned that it pumps out a face-melting 325 horsepower? Because it does. And after our latest story on the engine—it won an Innovation award—a commenter ...

The Mack MD Series features a 23,000-lb. rear axle and a 325-horsepower engine for improved towing and durability. These upgrades benefit sectors like refuse and construction, supporting various ...