Although still not my favorite view of the latest Mustang, it's starting to grow on me. The GT500 wing and stripes seem to help, as does the 5.0&SF plate. Once the aftermarket addresses that lower valance, I'm sure any hesitation will be a thing of the past. Like the front end, plenty of engineering went into making the back of the car more aerodynamic, and the Gurney flap on top of the wing is a big part of that. "Using data from the wind tunnel and the track, the new Shelby GT500 is near neutral at 120 mph--it makes about 20 pounds of lift," says John Pfeiffer, product development engineer. "This is 50 percent better than the KR and 75 percent better than the outgoing model." In layman's terms, that means this car is really stable when you're hauling ass.