These Super Narrow Trees from Mullins are precision-crafted in the USA to give your 35mm front end a sleek

Made from 1018 cold rolled steel for easy welding

Installation: Bolt-on

Includes a chrome-plated cap for the unused side

This complete inner primary mounting kit contains reproductions of original Harley Davidson hardware used to mount a stamped steel inner primary cover to the crank case and frame on Panheads 1955-1964

#8440-12 Rocker Box Cap Bolt Set 1936-1947 Harley-Davidson Knucklehead - Chrome Plated Brand_Lowbrow Customs. These Super Narrow Trees fromRocker Box Chrome plated Cap Bolt Set fits all Knucklehead engines 1936 1947. Made In Ohio, USA.