Some of the largest trucks in the world are Australian road trains. And the Western Star 4900 EX is equipped for this rugged challenge. Whether it's 100 or 150 tons or traveling through the harsh Australian outback, it's just part of the job for the 4900 EX. With engine choices up to 625 hp and the Western Star reputation for custom engineering, it's easy to see why Western Star is the truck of choice overseas.