There are more special editions Mustangs than you can shake a wrench at, but of all the variants we've seen so far, the Saleen SA-25 Sterling Edition is one of our favorites. Not only does it take all the attributes of the stock model and accentuates them, the SA-25's supercharged V8 comes packing 620 hp and 600 lb.-ft. of torque. The power matches the poise and we've added a handful of shots to the