The big news for 1966 was the introduction of the new 74ci Shovelhead OHV engine. Featuring distinctive rocker covers that again gave the motor its name, the engine also sported new cylinders and redesigned pushrods. The FLH came in two models: FLHFB, which included the four-speed foot-shifted transmission, and the FLHB, which came with the four-speed hand-shifted transmission.