Holley Chrome Carbureted Fuel Pressure Regulator 1-4 PSI 12-804

Item #21852

Holley Chrome Carbureted Fuel Pressure Regulator 1-4 PSI 12-804
Street/Strip Carbureted Applications
Two Port
Adjustable from 1 to 4 PSI
- +
Quantity: close


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


(1)Holley Chrome Carbureted Fuel Pressure Regulator 1-4 PSI 12-804


Brand: Holley
Color: Shiny
Emission Code: 5
Fuel System: Gasoline
Inlet Size: 3/8 inch NPT
Material: Aluminum
Outlet Size: 3/8 inch NPT
Pressure Range: 1-4 PSI
Product Type: Fuel Pump
Return Size: N/A
Style: Non-Return
Part Number: 12-804

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.


Instructions for Part# 12-804

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


1 Year Manufacturers Warranty

Eastwood Offers Free Lifetime Technical Support

Click here for product SDS information

Attention California Residents - Proposition 65

Proposition 65 Warning WARNING - Cancer and Reproductive Harm - www.P65Warnings.ca.gov


Customer Reviews

Questions & Answers