1968 Lotus 49 These ludicrous-looking rear wings on stilts - again pioneered by Lotus - were the start of the age of aerodynamics in Formula One.
They worked like an aeroplane wing in reverse - pushing the car down onto the track, creating greater grip and allowing it to corner faster.
In their first iteration, the wings were too fragile, and often broke, leading to a number of terrifying accidents.
The high wings were soon banned, but wings in general were here to stay.
The Lotus 49 had another revolutionary feature, introduced a year earlier before the wings.
The legendary Ford Cosworth DFV V8 was the first engine to be used as a fully-stressed part of the chassis, creating a much stiffer - and therefore more stable - car.
The DFV set new standards for reliability, flexibility and performance, and went on to win 155 Grands Prix between 1967 and 1983.