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Chrome Carbureted Fuel Pressure Regulator

Street/Strip Carbureted Applications Two Port Adjustable from 1 to 4 PSI

PART# 12-804

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$39.53   Suggested Retail
$35.58   Your Price
Estimated shipping date: 05/17/2021
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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 at 2.8 PSI so there is no guesswork when first installing the regulator. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. ***The inlet pressure limitation is 7 psi.


  • Adjustable fuel regulation from 1 to 4 psi
  • .220" (7/32") restriction
  • 3/8" NPT ports ( 1 in, 2 out)
  • Chrome finish
  • Mounting bracket included
  • Pre-set at 2.8 PSI


Emission Code5
Fuel SystemGasoline
Fuel TypeGasoline
Inlet Size3/8 inch NPT
Outlet Size3/8 inch NPT
Pressure Range1-4 PSI
Product TypeFuel Pressure Regulator
Return SizeN/A
WarrantyLimited 90 Day
Part Number12-804



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

Pre-set at 2.8 PSI ***The inlet pressure limitation is 7 psi.

Warranty Information

Limited 90 Day: See Details
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