Porsche 718 W-RS
The Porsche 718 is an open-cockpit racing car. The 718 was a development of the already successful Porsche 550A with improvements being made to the body work and suspension.
A two-litre version, the W-RS was developed in 1961. Initially fitted with a 4-cylinder engine, the car was later fitted with an enlarged flat-8 air-cooled engine from the Porsche 804 Formula One car which was developed to produce 240 horsepower. A W-RS finished 8th at Le Mans in 1963. The W-RS continued Porsche's success in the European Hill Climb Championship with Edgar Barth claiming the title in 1963.
The W-RS continued racing until 1964 when it was replaced by the 904.
Source: Wikipedia, 2012