Fuel Pressure Regulator
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Holley Fuel Pressure Regulator

Part No. 12-804 Warranty  

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Fuel pressure regulators are used to adjust for fuel pressure requirements of various carburetors. Too much fuel pressure for a given needle and seat assembly may cause flooding or drivability problems. 3/8 inch NPT ports. Allows adjustment of fuel pressure to compensate for high flow fuel pumps.

Product Features:
  • 3/8 in. NPT Ports
  • .220 in. Restriction
  • Incl. Mounting Bracket
  • Low Pressure 1-4 PSI
  • High Pressure 4.5-9 PSI
  • Chrome Finish
  • Not Alcohol Compatible
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3 Questions | 3 Answers
Displaying questions 1-3
  • Q:

    i am going from tbi to carb.i want to keep factory electric fuel pump(22psi) will this regulator be able to handle it to lower pressure to about 8 psi?
    Asked on 11/28/2013 by alex from groton ct

    1 answer



      Hi Alex, good question! this part is able to handle low pressure to about only 4 psi. Product features. Low Pressure - 1-4 PSI, High Pressure - 4.5-9 PSI. To locate the exact fuel pressure regulator, please provide us the year, make, model and engine size of your vehicle.

      Answered on 11/28/2013 by Steve from AAP
  • Q:

    Holley website list 12-804 as having a range of 1-4 psi. You previous answer to the other quest was that this regulates from 4-9 PSI. What are the actual specifications?
    Asked on 9/2/2012 by Rob from N.C.

    1 answer



      Sorry for the confusion caused. The Holley Fuel Pressure Regulator (Part No. 12-804) is a Low Pressure (1-4 PSI) regulator. We will have the previous answer corrected. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have.

      Answered on 9/2/2012 by John the Car-Doc from AAP
  • Q:

    does this have adjustable pressure or is it preset
    Asked on 8/8/2012 by derail

    1 answer



      This Holley Fuel Pressure Regulator (Part# 12-804) is used to adjust for fuel pressure requirements of various carburetors. This regulator adjusts from 4.5 to 9 psi. For further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

      Answered on 8/8/2012 by Rick from AAP
Displaying questions 1-3

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