481X #5 rear cam bearing. This is a high quality double row ball bearing used on the rear of the cam of a 481X engine. Bearing measures .985" I.D. x 2.443" O.D. x 1.00" wide. This bearing is used with the rest of the camshaft bearings being babbit. This fits the newer AJ type 481X engine blocks and not the early BBC 481X engine blocks.