Western Star now offers updated 4900 FA and SA 109-inch-BBC models featuring Allison 3000RDS transmission and Detroit Diesel DD13 engine. Targeted at construction, government, refuse and utility applications, the 109 has the shortest BBC in its class along with good outward vision and maneuverability, plus "superior" customization capabilities.

Additional updates to the 109 include under-hood air cleaners with inside/outside air and dash controls – ideal for snow plow applications – and a six gallon DEF tank with better packaging and increased clearance on the back of the cab.

The 109 is available with a 12,000 to 20,000-lb front axle, and 21,000 to 46,000-lb rears. The 13-litre DD13 engine features 350-450 hp and 1250-1650 lb ft of torque.

Western Star says the 109 is "body builder friendly," featuring a clean back-of-cab area and maximum space on the frame rails.