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Stewart Components E389A-BK34

In-Line Electric Water Pump 1-3/4" slip-on fittings

Stewart Components E389A-BK34


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Stewart Components E389A-BK34 In-Line Electric Water Pump 1-3/4" slip-on fittings $399.99
In-Line Electric Water Pump
  • 1-3/4" slip-on fittings
  • Black polymer resin inlet/outlet

  • Stewart Components E389A-BK34 Details

    Polymer In-Line Electric Water Pumps

    Utilizing the same proven, patented brushless motor as the E558, this next generation pump offers super strong, light, engineered polymer resin inlet and outlets that are available in 1-3/4" or 1-1/4" for smaller displacement engines. It uses the o-rings to seal for reliability. With a 10,000 hour rating it is unmatched by any other electric water pump.

    Whether you are looking for additional water flow to cool your street rod or are racing in the 24 Hours of Lemans, you can count on EMP/Stewart Components products!


    Manufacturer's Part Number:

    Stewart Components has developed in-line electric water pumps with unique features and benefits. Weighing less than 5 pounds and measuring 6'' long with a 4-1/4'' diameter, these pumps have single speed flow up to 55 GPM.
    The electronic control box can be mounted remotely using the prefabricated harnesses sold separately. The pumps can be used alone in many applications or as a booster pump for vehicles that experience overheating problems in low RPM situations.

    Because mechanical water pump speed is directly linked to engine RPM, overheating can become a major problem while in parades, cruises, or stop-and-go traffic. An in-line booster pump solves this problem by working with the mechanical pump to create constant added flow to the engine block. These pumps have been proven to increase flow by more than 300% at idle.

  • Available in Aluminum with 1-3/4'' slip-on inlet/outlet ports or
    Lightweight Polymer with 1-1/4'' or 1-3/4'' slip-on inlet/outlet ports
  • Can be used with 12 and 16 Volt Applications
  • Computer-controlled, liquid-cooled, brushless motor
  • Compact, lightweight, highly-efficient design
  • Decreased energy draw (only 8 amps at 12 volts)
  • Drive mechanism is independent from engine RPM
  • Cools engine after shutting down

  • Is this pump supposed to run continously or can it be shut off. That is, will the water flow through when off with flow from the stock belt driven pump

    Asked by: Joystick
    This can be run continuously or can be turned off if the extra flow isn't needed.
    Answered by: Rusty B
    Date published: 2017-09-20
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