Moroso 23541 Moroso Dry Sump Oil Pump Pulley - 20 ToothMoroso 23541 Moroso Dry Sump Oil Pump Pulley 20 Tooth Drive Pulley, Radius Tooth with 20 teeth Moroso black anodized Radius Tooth Pump Pulleys are designed to work more efficiently and take less power to drive your dry sump pump. These pulleys are made to use a 1. 00" wide drive belt and with a wide variety of sizes, most drive ratios you may need are achievable. All dry sump pulleys are made to accept a 5 8" shaft, and come with 4 set screws to lock