and Performance Parts and Accessories
FL5537 - Chevrolet 6 Cylinder, Small / Big Block with Short Water Pump Flex-A-Lite Fan Clutch
Thermal fan clutches are engineered to engage at low speeds when additional cooling is necessary. At high speeds, the clutch disengages to remove the load against the engine, providing a boost in horsepower and better fuel mileage.
This standard Flex-a-lite 5500 series fan clutch engages at 60-70% and disengages at 20-30% of the water pump pulley speed depending on engine temperature.
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