| | 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.
Roller Tappets, for 50mm Roller Bearings P4876707
"R" Blocks | 
|
