Mack Keystone

The Mack Keystone is Mack’s all-new Class 8 vocational tractor built to handle the toughest jobs both on and off the road. Designed for applications like construction, agriculture, logging, and heavy hauling, the Keystone combines rugged durability with modern technology and driver comfort. Powered by the Mack MP13 engine with up to 540 horsepower and 1,950 lb-ft of torque and paired with the mDRIVE HD transmission, it delivers powerful, efficient performance across demanding terrain. With higher ground clearance, multiple axle configurations, and advanced connectivity and safety features, the Mack Keystone is engineered to outwork challenging environments while keeping drivers comfortable and productive.