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Application: carb fuel pressure regulator is professionally designed for Holley and for Edelbrock carburetors, 3/8in NPT port 1 in, OE number is 12‑803, 2 out. Usage: fuel pressure regulator is designed to precisely control the fuel pressure from the fuel pump to the carburetor, practical carb part.


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. Specs: color: shiny | emission code: 5 | fuel type: gasoline | inlet size: 3/8" npt | material: Aluminum | Outlet Size: 3/8" NPT | Pressure Range: 4. 5-9 psi | product Type: Fuel Pump. The holley 12-803bp fuel pressure regulator features 3/8" npt in/out ports and a 3/8" npt return port. Note: the 803bp is designed for use with an electric fuel pump with a return line in the system.




Based on premium stainless steel & t7 aluminum Alloy materials & Nylon, light weight and portable, securely, Application: Universal, Such as fuel for automobiles or marine engines, most.
Adjustable fuel pressure regulator kit comes with a 1-3/4'' | 45mm gauge & 1/8'' NPT gauge port, adjustable from 0 to 100 psi to maximum fuel pump capacity, and 6AN inlet ports and return port. Designed for use with an electric fuel pump where fuel pressure is steadily delivered. Adjustable fuel Pressure Regulator to tune the fuel pressure to your needs.

1. Holley
#ad
Holley 12-841 HP Billet Carbureted by Pass Fuel Pressure Regulator
#adHolley #ad - Bypass Style. Carbureted Applications. Used in systems with a return lineback to tank. 3/8" npt ports. Adjustable 4. 5-9psi.More information #ad
Brand | Holley #ad |
Manufacturer | Holley #ad |
Height | 3.5 Inches |
Length | 2.5 Inches |
Width | 3.5 Inches |
Part Number | 12-841 |
Model | 12-841 |
Warranty | 90 days from date of purchase |
More information #ad
2. Holley
#ad
6 Psi Black E-Coat, Holley Bypass Regulator
#adHolley #ad - 1/8” npt gauge Port. 1/8" npt boost reference – 1:1. 3/8” npt inlet, outlet, and Return ports. Die cast aluminum construction. Durable and long lasting. Fit type: Vehicle Specific.More information #ad
Brand | Holley #ad |
Manufacturer | Holley #ad |
Height | 0 Inches |
Length | 0 Inches |
Weight | 0.5 Pounds |
Width | 0 Inches |
Part Number | 12-887 |
Model | 12-887 |
More information #ad
3. FOUF
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Adjustable Carburetor Fuel Pressure Regulator 4‑1/2 to 9 Psi Zinc Alloy 12‑803 for Holley, FOUF Bypass Billet Fuel Pressure Regulator with 3/8'' NPT Inlet and Outlet, Compatible with Gasoline
#adFOUF #ad - Improve carb performance: regulates fuel pressure to avoid valve needle and seat pressure overloads that can lead to overflows or drivability problems.Application: carb fuel pressure regulator is professionally designed for Holley and for Edelbrock carburetors, 3/8in NPT port 1 in, OE number is 12‑803, 2 out. Usage: fuel pressure regulator is designed to precisely control the fuel pressure from the fuel pump to the carburetor, practical carb part.
More information #ad
Function: fuel pressure regulator enables you to regulate your fuel pressure based on your carburetor and vehicle application needs. Solid material: fuel pressure regulator is made of high strength zinc alloy material, anti rust, wearproof, sturdy, not easy to damage.Brand | FOUF #ad |
Manufacturer | FOUF #ad |
Part Number | FOUFnym3d2vr078612 |
More information #ad
4. Edelbrock
#ad
Edelbrock 174131 Fuel Pressure Regulator Bypass Style 160GPH Red
#adEdelbrock #ad - Machined from aircraft quality aluminum for those who demand the best. Fuel pressure regulator Bypass Style 160GPH Red. Compatible with all grades of gasoline/methanol. Have a diaphragm made of fluorosilicate for extended life and high temperature protection.More information #ad
Brand | Edelbrock #ad |
Manufacturer | Edelbrock #ad |
Height | 3.1 Inches |
Length | 4.7 inches |
Weight | 0.82 Pounds |
Width | 3.9 inches |
Part Number | 174131 |
Model | 174131 |
Warranty | 90 Day Manufacturer |
More information #ad
5. Southwest Speed
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NEW HOLLEY CARBURETED BYPASS FUEL PRESSURE REGULATOR,STREET,STRIP,2 PORT,4.5-9 PSI,COMPATIBLE WITH ELECTRIC FUEL PUMPS W/RETURN LINE
#adSouthwest Speed #ad - Brand new holley carbureted bypass Fuel Pressure Regulator, Shiny Finish Part #12-803BP. Fits: electric fuel pumps with a return line in the system | features: adjustable fuel regulation from 4. 5 to 9 psi | preset to 7 psi | 3/8" npt ports 1 in, 1 out, 1 bypass or return | used in systems with a return line back to the fuel tank | Quieter fuel pump operation | Designed only for carburetor use | Polished finish | Mounting bracket included.Each holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task.
More information #ad
If you are using a mechanical fuel pump, use the 12-803 regulator. 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 & seat and may cause flooding or drivability problems. All holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. Specs: color: shiny | emission code: 5 | fuel type: gasoline | inlet size: 3/8" npt | material: Aluminum | Outlet Size: 3/8" NPT | Pressure Range: 4. 5-9 psi | product Type: Fuel Pump. The holley 12-803bp fuel pressure regulator features 3/8" npt in/out ports and a 3/8" npt return port. Note: the 803bp is designed for use with an electric fuel pump with a return line in the system.
Brand | Southwest Speed #ad |
Manufacturer | HOLLEY PERFORMANCE PRODUCTS #ad |
Height | 0 Inches |
Length | 0 Inches |
Weight | 0 Pounds |
Width | 0 Inches |
Part Number | HOL-12-803BP |
More information #ad
6. Quick Fuel Technology
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Quick Fuel Technology 30-803 Fuel Pressure Regulator
#adQuick Fuel Technology #ad - Includes mounting bracket. Includes an 1/8" NPT port for manifold reference. Supports 4-barrel gas engines up to 600 HP. Designed to operate within 4. 5 - 9 psi range. Preset at 7 PSI.More information #ad
Brand | Quick Fuel Technology #ad |
Manufacturer | Quick Fuel Technology #ad |
Height | 0 Inches |
Length | 0 Inches |
Weight | 0.74 Pounds |
Width | 0 Inches |
Part Number | 30803 |
Model | 30-803 |
More information #ad
7. Spectre
#ad
Spectre Performance 2518 Fuel Pressure Regulator
#adSpectre #ad - Adjustable through a pressure range of 1 psi to 4 psi. Barb fittings and mounting hardware included. 3/8 inch barb fittings and mounting hardware included. Bright plated finish.More information #ad
Adjustable through a pressure range of 1 psi to 4 psi. Bright plated finish. Use with 2515 or 59013 fuel pressure gauge. Made from high quality material. Made from high quality material. 3/8 in. Use with 2515 or 59013 fuel pressure gauge.Brand | Spectre #ad |
Manufacturer | Spectre #ad |
Height | 6 Inches |
Length | 4 Inches |
Weight | 0 Pounds |
Width | 3 Inches |
Part Number | 2518 |
Model | 2518 |
Warranty | 90 Days |
More information #ad
8. Holley
#ad
Shiny, Holley Carbureted By-Pass Regulator
#adHolley #ad - Used in systems with a return line back to the fuel tank. Preset to 7psi. Fit type: Vehicle Specific. Quieter fuel pump operation. Adjustable fuel regulation from 4-1/2 to 9 psi. 3/8” npt ports 1 in, 1 out, 1 bypass or return.More information #ad
Brand | Holley #ad |
Manufacturer | Holley #ad |
Height | 0 Inches |
Length | 0 Inches |
Weight | 0.1 Pounds |
Width | 0 Inches |
Part Number | 12803BP |
Model | 12-803BP |
More information #ad
9. OSIAS
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OSIAS Universal Adjustable Aluminum FPR Fuel Pressure Regulator Kit +160 Psi Pressure Gage AN6-6AN Fuel Line,Hose Fitting Connectors Kit …
#adOSIAS #ad - Oil gauge needle shows you exact reading & Tune the fuel pressure to meet your needs,The oil in the gauge stabilizes the needle to give you the most accurate readings. Add moderate fuel-injection quantity without changing computer oil supply mode, Fuel pressure regulator provides high performance, to save much money, long life and high reliability operation.Based on premium stainless steel & t7 aluminum Alloy materials & Nylon, light weight and portable, securely, Application: Universal, Such as fuel for automobiles or marine engines, most.
More information #ad
Adjustable fuel pressure regulator kit comes with a 1-3/4'' | 45mm gauge & 1/8'' NPT gauge port, adjustable from 0 to 100 psi to maximum fuel pump capacity, and 6AN inlet ports and return port. Designed for use with an electric fuel pump where fuel pressure is steadily delivered. Adjustable fuel Pressure Regulator to tune the fuel pressure to your needs.
Brand | OSIAS #ad |
Manufacturer | OSIAS #ad |
Part Number | 0412BLUESILVER |
Model | 0412BLUESILVER |
More information #ad
10. OSIAS
#ad
OSIAS Universal Aluminium Adjustable EFI Fuel Pressure Regulator Bypass Return Kit +160 Psi Pressure Gage AN6-6AN ORB Fitting Connectors Kit Black & Red …
#adOSIAS #ad - Sizethe hose end fitting made of high quality T6061 Aluminum and -6AN size. Support high power application: 300-800 H. Universal for all Type Cars,2years Warranty. Materialthe fuel hose made of 304 stainless steel & 380mm & CPE synthetic rubber, Length: 170mm & 660mm.More information #ad
Featurecomes with a 1-3/4'' | 45mm gauge & 1/8'' NPT gauge port, adjustable from 0 to 100 psi to maximum fuel pump capacity. Packercomes with a fuel pressure regulator, -6AN inlet ports and return port.Brand | OSIAS #ad |
Manufacturer | OSIAS #ad |
Part Number | 0412BLACKRED |
Model | 0412BLACKRED |
More information #ad