Holley 12-803BP Carbureted Bypass Fuel Pressure Regulator
Holley 12-803BP Carbureted Bypass Fuel Pressure Regulator
Holley

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#42512803BP

Holley 12-803BP Carbureted Bypass Fuel Pressure Regulator

  • Offers adjustable fuel regulation from 4-1/2 to 9 psi
  • Can be used in systems with a return line back to the fuel tank
  • Specially designed only for carburetor use
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$144.95

/each

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This part is Backordered. We currently do not have an estimate when this item will ship.


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Product Summary

Universal Fit, 4.5-9 Fuel Pressure Rating (psi)

  • Offers adjustable fuel regulation from 4-1/2 to 9 psi
  • Can be used in systems with a return line back to the fuel tank
  • Specially designed only for carburetor use
  • Made from lightweight aluminum and has a beautiful polished finish
  • It is pre-set to 7 PSI and has 3/8 NPT ports all around
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Key Specs

MFG. Part #12-803BP
BrandHolley
Regulator StyleBypass
Material TypeAluminum
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Holley 12-803BP Details

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.

  • 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
  • Chrome finish
  • Mounting bracket included

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Holley 12-803BP Specifications

KEY SPECS
MFG. Part #12-803BP
BrandHolley
Regulator StyleBypass
Material TypeAluminum
GENERAL
Fuel Pressure Rating (psi)4.5-9
Pressure Regulator Inlet Size3/8" NPT
Pressure Regulator Outlet Size3/8" NPT
Fuel TypeGasoline
GTIN Code090127605172

Ratings & Reviews

5

3 Reviews

Overall Assessment

Holley's return style fuel pump regulator is favored by customers for its proven durability and efficiency. Reviewers noted its high-quality build, leading to long-term usability without issues such as leakage which were experienced with rival products like the Speedmaster unit. The product's practicality in regular use is praised, making it a trusted repeat purchase for many. Holley's consistent performance stands out among other brands, solidifying its top-ranking position.

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5

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Should have bought Holley from start

5.0

5 years ago

Yetiman42066

Mayfield, Ky

Verified

I needed a return style regulator for my fuel pump. I wasted time and money by buying a Speedmaster unit. It lasted around 6 month's and started leaking out the top. I had been running a Holley non return style for years with zero problems or complaints. Hopefully, this one will follow suit.

Would Recommend

I will buy again

5.0

8 years ago

flathead

Ohio

Verified

We use these regulators all the time, works great.

Would Recommend

Holley never let's me down.

5.0

9 years ago

Mr. Fiero

Pa

Verified

Always satisfied with holleys products.

Would Recommend

Showing 3 of 3 reviews

Questions & Answers

1 Question • 1 Answer

Can you use e-85 with this?

by Zinx

• 3 years ago

1 answer

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