Harley-Davidson's Shovelhead engine debuted in the mid-1960s after ... Naturally, as the successor to the Panhead (which itself came after the Knucklehead), it was pretty obvious that Harley ...

The panhead was a Harley-Davidson motorcycle engine, so nicknamed because of the distinct shape of the rocker covers. The engine is a two-cylinder, two-valve-per-cylinder, pushrod V-twin.