| | The 48° tappet "R" blocks (R1, R2, R3, R4) and the 48° tappet aluminum blocks require special cams. These UGL (unground lobe cams) can be provided to cam grinders to enable them to grind their specific cam profiles to create a finished cam. Cannot be used in engine as is.
Flat Tappets, for Babbitt Bearings P4876372
"R" Blocks | 
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