Brand: EMP/Stewart Components Manufacturer's Part Number: 22203 Part Type: Water Pumps， Mechanical Product Line: EMP Stewart Stage 2 Water Pumps Summit Racing Part Number: EMP-22203 UPC: 694455000526 Pump Flow: High-volume Water Pump Rotation: Clockwise Pilot Diameter (in.): 0.750 in. Pump Material: Aluminum Pump Color: Natural Water Pump Style: Short Quantity: Sold individually. Notes: This is a short style water pump that measures 5.625 in. Must use a high-flow thermostat if a thermostat is being used. EMP Stewart Stage 2 Water Pumps EMP Stewart water pumps are the premier choice of professional engine builders， race teams， and performance enthusiasts. They're great for street rodding and OEM replacement applications and even the most extreme forms of motorsports in the world， including NASCAR Winston Cup and NHRA Pro Stock. These EMP Stewart Stage 2 water pumps are assembled in an exclusive 356-T6 heat-treated aluminum casting. These pumps include several significant performance modifications， compared to Stage 1 pumps， for maximum performance. EMP Stewart Stage 2 water pumps are recommended for stock， OEM， or mild to moderate racing applications.