These rod bearings were included with the steel rods https://pbase.com/9146gt/my9146gt_28rsr_engine_rods_and_bearings and they are NOT factory 911 RSR rod bearings. The 911 RSR rod racing bearings and the connecting rods both have two tangs (notches) per side for added reliability and assurance the bearings will stay in place at sustained high rpm's.

Here is a link to a NOS set of factory racing RSR connecting rods and rod bearings https://pbase.com/slidevalve911rsr/911rsr_factory_parts_engine_rsr_rods

The set at the left side of this photo https://pbase.com/image/165048459 is incomplete with 10 halves with the 2nd set on the right being complete with 12 halves.