The WRC was formed from well-known and popular international rallies, most of which had previously been part of the European Rally Championship or the International Championship for Manufacturers, and the series was first contested in 1973. The World Rally Car is the current car specification in the series. It evolved from Group A cars which replaced the banned Group B supercars. World Rally Cars are built on production 1.6-litre four-cylinder cars, but feature turbochargers, anti-lag systems, four-wheel-drive, sequential gearboxes, aerodynamic parts and other enhancements bringing the price of a WRC car to around €700,000 (US$1 million)