The Lotus 38 was the first rear-engined car to win the Indianapolis 500, in 1965, driven by Jim Clark. It was run by Lotus at Indianapolis from 1965 to 1967; a total of 8 were built, most for use by Lotus, but several were sold for use by other drivers, including A. J. Foyt and Mario Andretti.

James Clark OBE was a British racing driver from Scotland who won two Formula One World Championships in 1963 and 1965. A versatile driver, he competed in sports cars, touring cars, and in the Indianapolis 500, which he won in 1965. He was particularly associated with Team Lotus, driving for the team his entire Formula One career between 1960 and 1968.