John Lingenfelter may have left this world but his spirit lives on in the Twin Turbo Commemorative Corvette. Only 25 will be built to celebrate the 25th anniversary of Ligenfelter Performance Engineering. The package boosts the C6's horsepower to a mind-numbing 725 ponies with an intercooled twin turbo system and Corsa exhaust. New wheels, tires and upgraded brakes will help control the beast. Lingenfelter will also outfit the car with special leather seats and steering wheel and a new hood, front spoiler side skirts and rear bumper cover. No word on price, but this is another one of those "if you have to ask, you can't afford" cars. Somewhere John is smiling.