Yeah but theres 3 std sizes for the inner crank face and upto 5 for the caps if i understand correctly So STD doesnt really clear it up. You can have a factory car with size 0,0,2,1,2. For each journal For instance My 4age had the stamps on the block and they were like 1.3.2.2.3 meaning that there were a variety of sized bearings used from factory. Its better to double check and get it right than have to do it all again with extra work with a damaged crank etc