CUMMINS , ISM, L10 & M11; FLAT FLYWHEEL WITH 10" CENTER FOR 15 1/2" CLUTCH 103 TOOTH RING GEAR WITH 8 MOUNT HOLES & 2 THREADED HOLES RING GEAR: 103 TEETH PILOT BEARING: TP836306 CROSS REFERENCE: 3027548, 3328689, 3328688