ImageMuch credit for the F-450's capabilities goes to the new 6.4 L Powerstroke diesel. Upon popping the hood, we found the largest cooling package we've ever seen in a pickup; on the other hand, little of the actual engine was visible under a maze of plumbing. A bit of poking around revealed twin sequential turbochargers; the second-stage scroll features electromechanical variable-vane technology, and both units combine to provide an amazing maximum indicated boost of 32 PSI. Piezo injectors force in enough low-sulfur fuel to burn all that intake air to the tune of 360 HP and 650 lb-ft of torque. The massive power is routed through the Torqshift five-speed transmission (little known fact - there's actually a sixth ratio used during warm-up), and finds its way to the tires via ultra-deep 4.88:1 axle gears.
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