Quote Originally Posted by EJ25RUN
i hate using wiki but this is accurate

"Porsche debuted the 911 GT1 in 1995, announcing that it would compete at the 1996 24 Hours of Le Mans. In spite of its name, the car actually has very little in common with the 911, its floorpan was taken from the 956/962 Group C car. In addition, the GT1 featured a water-cooled, twin-turbocharged and intercooled, four valve per cylinder flat-six in a mid-mounted position and making about 600 horsepower (450 kW). In comparison, the 993 generation 911 GT2, which was otherwise the company's highest-performance vehicle, used an air-cooled engine with only two valves per cylinder and mounted in the rear, which is the traditional layout for the 911."
"Apparent from the front and rear lights, the GT1 shares many components with its series production counterparts, but puts them together in a more competitive way...."

"The GT1 was based on the 993 bodyshell, but with modified exterior panels and a substantial roll-cage that also supported the engine, gearbox and suspension. This helped Porsche avoid neccessary crash testing and reinforced ties to the production cars..."

"...a complete interior included sport seats and a full dashboard from the 993 line..."

From supercars.net