English: British Racing Green McLaren F1 GTR Longtail(XP GT) at Geneva International Motor Show 2015

The McLaren F1 GTR is a racing variant of the McLaren F1 sports car first produced in 1995 for grand touring style racing. This British Racing Green example is the first of three street-legal “Longtails” built to satisfy FIA GT homologation rules, so that one-off prototype race cars can be considered modified versions of road cars. McLaren only had to build one, and later, two more for interested customers.

The Longtail was conceived after the F1 GTR won the 24 Hours of Le Mans straight out of the box. It was an incredible feat, but more work was needed to keep the car glued to the track. The solution: Extend the nose and tail by a collective two feet, widen the track four inches, fit larger 18-inch wheels, and enlarge the roof-mounted air duct to feed the 6.1-liter V-12 more oxygen. The road car, without FIA restrictors for the full 627 hp, goes without the GTR’s wing and additional ground effects