INCLUDES: MOUNTING GASKETS, BACKPLATE GASKET AND O-RINGS; 4.370" PULLEY DIAMETER OEM #: OR1013, OR1015, OR3007, 4P3683, 4P8520, 4W02553, 9V4879, 9Y5250 CASTING #: 187-8957 CORE #: 551 CORE PRICE: $50.00