Kimberly Cooper Special Driven by Jack Brabham in Indianapolis 500, May 30, 1961

This image shows the atypically low-slung, rear-engined Kimberly Cooper-Climax Special during the 1961 Indianapolis 500 race. Though it only managed a ninth-place finish, the little car changed American auto racing. The Cooper-Climax started a revolution in a sport that had been dominated by big front-engined cars for 50 years. Since 1965, every Indianapolis 500 winner has had a rear-mounted engine.