The 2011 Ford F-150 EcoBoost is one of the worst kept secrets out of Dearborn, and the crew at PickupTrucks.com have managed to snag some of the first shots of a SuperCab FX4 model undergoing testing.

While the changes to the exterior don't divulge much, the cut in the lower air dam clearly shows an intercooler mounted in front of the radiator.

The direct-injected, turbocharged 3.5-liter V6 is rumored to be rated at around 400 horsepower and more than 400 pound-feet of torque, enough to keep up with the standard 6.2-liter V8's 411 hp and 434 lb.-ft. of twist, while returning fuel economy somewhere in the range of 23 mpg on the highway.

Sales are expected to begin later this year or in early 2011, and it's safe to assume that the EcoBoosted F-150 will carry a slight price premium over its V8-powered counterpart.

[Source: PickupTrucks.com]