Case increased the horsepower in the transition to Tier-3 certification for all four models in its new 400 Series 3 compact track loaders. The 420CT and 445CT Series 3 models feature Case 3.2-liter turbocharged engines, while the 440CT and 450CT Series 3 models are powered by a 4.5-liter turbocharged Case engine. The new engines provide improved torque, which increases performance across the line.