Description Part number 6B2960H-.25 ACL Race Series connecting rod bearings Nissan Skyline – 2.5, 2.6 (RB25DE, RB25DET, RB26DETT) Oil Clearance  Over Size Half Type         Identical Halves Material          F781 Min. Std Shaft Size      47.956 Max. Std Shaft Size      47.974 Min. Std Tunnel Size   51.000 Max. Std Tunnel Size   51.013 Max Wall at Crown     1,503 Max Overall Length    17,1