Panhead Vs. Knucklehead Vs. Shovelhead: Harley-Davidson Engines, Compared
The Knucklehead, Panhead, and Shovelhead are all important parts of Harley-Davidson history, each preceding the one before it ...
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Here's How The Harley-Davidson Shovelhead Engine Got It's Name
In fact, the manufacturer had an entire line of head-themed engines, including the Knucklehead, Panhead, and Shovelhead, with some featuring in the rarest Harley-Davidson motorcycles ever built.