A limited run of track-focused McLaren MP4-12C GT Can-Am special editions have been announced ahead of the United States Grand Prix. No more than 30 of the £375,000 track cars will be built.

McLaren describes the MP4-12C GT Can-Am has “the ultimate track car”. It is based on the 12C GT3 race car and fitted with an unrestricted version of McLaren’s 3.8-litre twin-turbo V8. 

The unit features bespoke engine calibration and a revised cooling system. Power is rated at 630bhp, making it the most powerful 12C yet.

McLaren says the GT Can-Am is not homologated for the road or any current race series. A spokesman confirmed there are no current plans for a one-make race series.

A large carbonfibre rear wing forms part of the car’s aero package, which has increased downforce by 30 per cent. Carbonfibre door mirror mounts and covers, engine cover vents, side radiator intake vanes, sill covers and badges differentiate the Can-Am from the GT3 race car. It is fitted with black forged lightweight alloy wheels shod with Pirelli racing tyres.

The car is fitted with an FIA-approved race-spec roll cage, race seats with six-point harnesses and a steering wheel carried over from the GT3 racer. Air conditioning is fed through a bespoke carbonfibre dashboard.

Buyers are offered a range of bespoke support packages from McLaren GT.

The car has been developed after a concept was shown in Pebble Beach earlier this year. McLaren MD Andrew Kirkaldy described reaction to the car as "remarkable".