The GT3 racer features the same 3.8-liter twin turbo V8 engine as the production model but with just 500 PS (368 kW / 493 bhp) instead of the series' 600 PS (441 kW / 592 bhp).
The specs are out on the McLaren MP4-12C GT3 and the surprise is that the racer actually has less output than the road-going standard MP4-12C.
The GT3 racer features the same 3.8-liter twin turbo V8 engine (known internally as the M838T) but with just 500 PS (368 kW / 493 bhp) instead of the series' 600 PS (441 kW / 592 bhp).
The loss of power is compensated by improved aerodynamics and a reduction in weight, particularly in the new six-speed sequential gearbox which weighs 80 kg less than the seven-speed transmission of the street-legal variant.
The GT3 also gets a race suspension and borrows some F1 technology such as for the steering wheel, seats, tires and electronic systems.
The MP4-12C GT3 will race in selected endurance events in 2011 including the Blancpain Endurance Series at the Circuito de Navarra in Spain and the 24 hrs at Spa. The car will also put in a special guest appearance at the Goodwood Festival of Speed.
Ready-to-race new McLaren MP4-12C GT3 will be priced at £310,000. Andrew Kirkaldy, CRS Racing Team Principal and Project Manager for McLaren GT said: "Having been a customer of GT car manufacturers for many years, I'm delighted we are now able to offer a carbon chassis based GT3 car for £310,000. There will be no hidden costs and we will work as hard as we can to support as many races as we can."