Fuel Pressure Regulator
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Holley Fuel Pressure Regulator

Part No. 12-704 Warranty Details  

Fit of this part varies by vehicle & equipment specs Type of Fit

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:
  • Regulates From 4.5-9 PSI
  • One 1/2 in. NPT Inlet
  • Two 1/2 in. NPT Outlet Ports
  • .437 in. Restriction
  • Incl. Mounting Hardware
  • And AN Style Fittings
  • Alcohol Compatible
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by PowerReviews
HolleyFuel Pressure Regulator

(based on 1 review)

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  • 1 Stars



Reviewed by 1 customer

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(1 of 1 customers found this review helpful)


Holley Fuel Pressure Regulator


from Austin, MN

Verified Buyer



    • Leaks

    Best Uses

    • Replacement

    Comments about Holley Fuel Pressure Regulator:

    This pressure regulator is designed for Alcohol in the gas. (10% Ethanol in all gas here in MN). After 3 days the diaphram leaked gas. I had a replacement diaphram on hand & so far it hasn't leaked. (The cheaper $28.00 model isn't designed/recommended for gas with Ethanol)

    • Car & Truck:
    • Auto Enthusiast

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