Take a look at the new 2012 Jeep Grand Cherokee SRT8, and you might not need that testosterone injection. In addition to the stronger stance and racy details, it makes 465 horsepower from 6.4 liters and can get from zero to 60 in just 4.8 seconds, according to Jeep.

Paddle-shifters are standard, along with an adaptive (lowered) suspension system to make sure that—in the fashion of the Range Rover Sport—you're always ready for street, snow, towing, track use, or even mild off-roading.

Otherwise, the SR8 is much the same as the all-new 2011 Jeep Grand Cherokee that made its debut this past year; the Grand is built on a Mercedes-Benz platform that helps it feel light years ahead of the previous version in refinement and ride quality, with much-improved steering and a much better-detailed interior to boot.

There's also a host of trim and equipment upgrades in the SRT8, including big 20-inch wheels and run-flat tires, Brembo brakes, body cladding, a heated steering wheel, suede-and-leather seats, touch-screen infotainment, and carbon-fiber trim. To see some of these details, browse our first live pictures (above) from the SRT8's debut at the New York show.

For more details, see our Preview of the 2011 Jeep Grand Cherokee SRT8 over at The Car Connection, and be sure to follow all the latest as we cover it live from the floor of the New York auto show.