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Holley Fuel Pressure Regulator, 1 to 4 psi Adjustable

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Holley low-pressure fuel pressure regulators help to ensure a constant, steady flow of gas to the carburetor regardless of variations in fuel pump output pressure.

The 1-4 psi model is preset to approximately 2.7 psi. With the aid of an accurate pressure gauge (not included), it can be easily adjusted as required within its specified range.

There is one inlet port (bottom) and two output ports (side) to aid the connection of multiple carbs or dual float bowls on a single carb. Alternately, single carburetor applications can use the remaining port for a fuel pressure gauge. All of the ports are 3/8 NPT female.

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Part No.

1135-1 TO 4
Condition: New

Holley Fuel Pressure Regulator, 1 to 4 psi

$29.99In Stock

Excellent product


This FPR is ideal for the SU carburettor application in my MGB. It stopped the tendency of flooding due to the vibration of the car on poor roads.


Melbourne Australia

Works fine, good value, hard to adjust


I trust Holley products. Chromed finish and smooth surface may a nice looking object. Operation with a 60 hp engine is as it should be. I have two, and their regulated output as set from the factory is very close to the 2.7 psi listed. They match within about 1/4 psi. Mine are used in a high vibration environment, so shock mounted, as a precaution. Only complaint, is I wanted to readjust mine, and haven't been able to loosen the adjustment screw and jam nut on either regulator. They may be locked with red thread locker. If you may ever want to adjust yours, loosen the adjuster before any shock mounting.

A flyer

Madison, WI


Holley Fuel Pressure Regulator, 1 to 4 psi Adjustable

4.5 2