Here's the link:
http://cars.mclaren.com/home/models_...en-p1-gtr.html
"Without road-car regulations to hold it back, the McLaren P1™ GTR will push everything to the limit. Available only to McLaren P1™ owners, production of the track-focused GTR will begin in 2015, when the 375th and final road car has been built.
Shown at the prestigious Concours d’Elegance event in California, this aggressive design concept is a preview to the final model which shall be built, maintained and run by McLaren Special Operations. Development work has now entered the next phase as the team works to hone and further optimise the ultimate track-focused racer.
The mid-mounted powerplant has an increased output of 1,000PS (986bhp) and includes an ERS-style push-to-pass system. The large fixed rear wing features a Formula 1™-derived Drag Reduction System and the wing mirrors have been repositioned to the A pillars to put them closer to the eye line of the driver and reduce aerodynamic drag. The car sits at a fixed ride height on race-prepared suspension over 19-inch motorsport alloy wheels. Below the rear wing is the exposed, centrally mounted inconel and titanium alloy exhaust. This all new straight cut twin pipe design has been developed exclusively for the GTR."