Flowkooler designed a high-flow water pump for the 289 Hi Po engine with a CNC machined billet impeller with 16 vanes, integrated shrouding, and a reduced casting-to-impeller vane clearance.  It achieves greater flow rates, higher head pressure, and a more efficient flow. The impeller color is due to Type II Class II military-grade surface coating which protects against corrosive fluids. 

FlowKooler introduced the first hi-flow pumps and continues to improve impeller design. Why is increased flow so important to cooling a hot Ford engine? It has been proven time and time again that reducing the cycle time between the heat source and the heat sink creates more opportunities to shed heat and drop engine temperatures.

From 0-3,300 RPM…Nothing Beats a FlowKooler!

Features:

• Impeller chamber is directional to clockwise rotation
• Lower radiator hose outlet on right side (passenger side)
• Doesn't use backing plate
• For Ford 289 high-performance factory applications only.  Standard 289s often use the 1681 pump
• Alternative Part Numbers  C2OE8505B, C2OE8505C, C2OZ8501A, C2OZ8501B, C2OZ8501C, C3OE8505A, C3OZ8501A, C3OZ8501B, C5AE8505C, C5AZ8501B, C5AZ8501K, C5OZ8501A
• Parts Contained in Box:
• Mounting Gasket, 5 1/8" x 5/16" Bolt, 2 1/2" x 5/16" Bolt, Installation Sheet, FlowKooler Decal

General Specifications:

• Type of Material of Pump Body: Aluminum
• Number of Blades on Impeller: 16 CNC Aluminum
• Direction of Rotation: CW
• Fan Hub Working Height: 5 1/8"
• Inlet outside diametert: 1 3/4"
• Hose Connections (1st and 2nd)
• Gender: Male
• Diameter: 5/8"
• Threaded: No