The Mack Trucks Mack Anthem features optimized aerodynamics to help improve fuel efficiency and new driving and sleeping environments designed to increase driver comfort and productivity. The Mack Anthem is available in a Day Cab, 48” Flat Top Sleeper or 70” Stand-Up Sleeper. These models use Mack’s 13L MP8 engine, which provides up to 505 hp and 1,860 lb-ft of torque. These models can also be spec’d with the 11L Mack MP7 engine to save approximately 400 lbs of weight.