SKU: 20068663644

Holley Carburetor Bypass Style Fuel Pressure Regulators 12-803BP

Sale price$130.45 Regular price$144.95
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Description

Holley Carburetor Bypass Style Fuel Pressure Regulators 12-803BPOverview: 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

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 12-803BP fuel pressure regulator features 3/8" NPT in/out ports and a 3/8" NPT return port.

Features:

  • Adjustable fuel regulation from 4-1/2 to 9 psi
  • Preset to 7psi
  • 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

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Holley
Color Shiny
Emission Code 5
Fuel System Gasoline
Fuel Type Gasoline
Inlet Size 3/8 inch NPT
Material Aluminum
Outlet Size 3/8 inch NPT
Pressure Range 4.5-9 PSI
Product Type Fuel Pressure Regulator
Return Size 3/8 inch NPT
Style Bypass
Warning California Proposition 65
Warranty Limited 90 Day
Shipping Notes
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Exchange/Return Notes
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SKU: 20068663644

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4.6 ★★★★★
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C
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Chorzepa
Port Orchard, US
★★★★★ 5
An excellent book
Format: Hardcover
An excellent book, based on Japanese documents—offering, for the first time, such a detailed account of the first aircraft carrier battle, presented from the Japanese perspective. It covers every Japanese aircraft involved, as well as the fates of their naval aircrews. A must-read for anyone interested in World War II in the Pacific.
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Reviewed in the United States on May 8, 2026
J
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james
Fort Morgan, US
★★★★★ 5
Excellent book.
Format: Audiobook
History of WWII. Great research.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
L
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LynneC
Carnegie, US
★★★★★ 4
Good Book, not Parshall though
Format: Kindle
The author uses more Japanese terms than any similar book that I've read but uses western naming conventions for Japanese people. I don't quite know what to think. Good diagrams.
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Reviewed in the United States on December 12, 2025
R
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Robert K. B
Los Angeles, US
★★★★★ 5
Japanese mindset Coral Sea
Format: Kindle
This book gave me fresh insights to the Battle of the Coral Sea. I feel like I have an idea as to what was going through the Japanese minds. Well written. He make it easy to follow each step of the battle.
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Reviewed in the United States on April 19, 2026
C
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Christine
Lake Worth, US
★★★★★ 5
A Less Than Famous Battle
Format: Hardcover
Very thorough on a battle that was not as decisive as Midway.
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Reviewed in the United States on May 1, 2026

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