The Victor Series Mechanical Water Pump is cast from A6 aluminum, heat-treated to T-6 specifications and then machined on 's computerized CNC machines for optimum quality and maximum performance for both street and track applications. These ?super cooling' water pumps are designed to provide maximum flow, maximum pressure and equal distribution to both sides of the block within percent. The CNC-machined, cast iron impellers are larger than other impellers, and have curved vanes that produce greater flow with less cavitation. It also features a /8 pilot shaft and the inlet diameter measures .. These high-volume pumps are ideal to combat over-heating.