Saleen's been one of everyone's favorite Mustang-modifiers for years, and we now know all the juicy numbers for the 2015 S302, and have a nice view of it from the side. The big news is that in supercharged form, the S302 will put out a very healthy 640 HP — that's about one BRZ more HP than a stock 2015 Mustang.
The S302 takes a page from the booze industry and will be offered in three different types: White Label, Yellow Label, and Black Label. The White label adds new fuel injectors, some changes to the engine's breathing and a more aggressive exhaust, but stays naturally aspirated, for a modest bump to 450 HP from the stock Mustang V8's 435 HP.
The Yellow and Black labels supercharge the engine (along with a bunch of other improvements) to take it to 640 HP/ 565 torque. The Yellow edition is mostly like the White but with a supercharged engine, while the Black Label adds the alacantara bits and functional induction hood and brake cooling system and all those toys.
Stylistically, the S302 keeps to the Saleen formula of a slightly modified-looking Mustang with some of the traditional Mustang visual cues (the fake side intakes, for example) smoothed away and replaced with alternative grille treatments, lighting, and various air dams and spoilers.
We're told that the 640 HP number was picked to honor/tease Steve Saleen's good friend Bill Gates, who once famously claimed (though this is disputed) that no personal computer would ever need more than 640K of memory.
Actually, I made that part up, but it's a good rumor. Here's Saleen's spec sheets for you to scrutinize and study. Oh, and if you want one, you can place a deposit of $2015 to reserve one. I think they picked that number because it's half of the engine's displacement in cc's minus 459, which is Steve Saleen's birthday, April 1959. Except he was born in 1949. Make sense?