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Chrome Carbureted Fuel Pressure Regulator

Street/Strip Carbureted Applications Two Port Adjustable from 4.5 to 9 PSI

PART# 12-803

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If you are using a mechanical fuel pump, use the 12-803 regulator. If you are using an electric pump with a return line in the system, use the 12-803BP.

Overview

Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. The Holley 12-803 fuel pressure regulator features 3/8" NPT in/out ports.

Features:

  • Adjustable fuel regulation from 4-1/2 to 9 psi
  • .220" (7/32") restriction
  • 3/8" NPT ports ( 1 in, 2 out)
  • Chrome finish
  • Mounting bracket included

Specs

BrandHolley
ColorShiny
Emission Code5
Fuel SystemGasoline
Inlet Size3/8 inch NPT
MaterialAluminum
Outlet Size3/8 inch NPT
Pressure Range4.5-9 PSI
Product TypeFuel Pump
StyleNon-Return
Part Number12-803

Emissions

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

If you are using a mechanical fuel pump, use the 12-803 regulator. If you are using an electric pump with a return line in the system, use the 12-803BP.
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        *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

        Some parts are not legal for use in California or other states with similar regulations.