ARP 1357901 Oil Pump Driveshaft Kit Extra heavy-duty oil pump driveshaft can help you avoid expensive engine damage Designed for increased capacity oil pumps or heavy viscosity lubricants Shaft has larger diameter than the OEM unit Made from premium grade 8740 chrome moly steel and heat-treated to 190,000 psi Alignment sleeve is roll formed onto the shaft and floats, so it can adjust to slight misalignment