CUMMINS , ISM, L10 & M11; FLAT FLYWHEEL WITH 8 9/16" 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: 3899201 CORE #: 175 CORE PRICE: $250.00