Nearly all Harley-Davidson engines have the company's hallmark V-Twin design, and iconic sound and power. Here are the ones we think are the best of the bunch.

A modeling fan taught himself the skills to 3D print 1:4 scale engine and wheel masterpieces that have the enthusiast community enthralled.

The Harley-Davidson Twin Cam engine helped lift the American motorcycle builder when it needed it most. We checked out some of the best models to come with it.