Hemi fuel pump cam hex drive. This part allows the racer to drive a .375" hex of the end of there Chrysler Hemi, 440, KB, BAE, JP-1, TFX camshaft. It is made from billet steel and bolts to the cam using a three 3/8-16" socket head Allen bolts.
Hub uses .750" thrust bearings and shims to set cam thrust.
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