As part of its 70th birthday celebrations, Porsche has officially unveiled two distinctive factory-fielded Porsche 911 RSRs, both sporting traditional liveries from the 1970s and 1980s, and set to take part in this year's 24 Hours of Le Mans endurance race.

A total of ten Porsche 911 RSR racers will participate the 86th edition of 24 Hours of Le Mans in 2018, four fielded by the factory and six by customer teams.

The factory-fielded 911 RSRs will be wearing the starting numbers 91 and 92. The 91 racer's livery is reminiscent of the Rothmans blue-and-white paintwork, finished with red and gold stripes. The most successful examples of Porsches wearing this colour scheme are the 1986 Paris-Dakar-winning Porsche 959 and the multi-Le Mans-winning Porsche 956 C and 962C.

The 92 car, however, adopts the famous “Pink Pig” design of the Porsche 917/20 from 1971. This design harks back to a one-of-a-kind Porsche race car that was conceived to combine both the aerodynamic advantages of the short and long-tail versions of the 917. The "Pink Pig" is easily one of the most popular Porsche racers of the era.