5. 2007 Corvette C6RS
It seems the only thing Jay Leno likes more than a fast car is an environmentally friendly fast car. The two worlds collided when Le Mans-winning race team Pratt & Miller teamed up with Leno's mechanics to create a FlexFuel-running "race car for the street". The Vette was widened, given a bigger engine (8.2 L V8), and had its interior upgraded to something that doesn't look like it came out of a Chevy Malibu. Last we heard, Leno was going to throw in a sequential shifter. Perfect Corvette? Yes.