North America's best-selling pickup is being refined in a number of ways. For example, the 375-horsepower, 3.5-litre EcoBoost V6 is now paired with a ten-speed automatic gearbox. This same engine is included in the F-150 Raptor, a sport version that boasts 420 horsepower. This year marks the arrival of a new generation of the Super Duty (2500, 3500 and 4500) with an aluminum body. Several engines are available, including a new 6.7-litre Power Stroke diesel.