Home » Holley Two Port 4.5 - 9 PSI Bypass Style Fuel Pressure Regulator - For Systems w/ a Return Line Back to Fuel Cell
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Holley Two Port 4.5 - 9 PSI Bypass Style Fuel Pressure Regulator - For Systems w/ a Return Line Back to Fuel Cell

In stock
SKU: HLY12-803BP
Fuel Pressure Regulator, 4-1/2 to 9 psi, In-Line, 3/8 in NPT Inlet, 3/8 in NPT Outlet, 3/8 in NPT Return, Bypass, Aluminum, Polished, Gas, Each
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$112.46
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PROP 65: These products may contain a chemical known to the state of California to cause cancer and birth defects or other reproductive harm

Fuel pressure regulators are used to adjust for fuel pressure requirements of various carburetors. Too much fuel pressure for a given needle and seat assembly may cause flooding or driveability problems. Features

  • 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
  • Preset to 7PSI
  • Adjustable from 4-1/2 to 9 PSI
  • Chrome Finish

    Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution or partnered with products from other Holley companies we can give you the edge you need over the competition!

    The 803BP is designed for use with an electric fuel pump with a return line in the system. If you are using a mechanical fuel pump, use the 12-803 regulator. The mounting holes in the regulator are not threaded. The screws included are self-tapping for use in installation.

  • 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

    • Product Description:

  • Fuel Pressure Regulator
  • 4-1/2 to 9 psi
  • In-Line
  • 3/8 in NPT Inlet
  • 3/8 in NPT Outlet
  • 3/8 in NPT Return
  • Bypass
  • Aluminum
  • Polished
  • Gas
  • Sold Individually
    • For over a century Holley has driven the cutting edge of fuel-system design. That work continues today through Holley’s market-leading EFI products as well as through Holley’s family of best-in-industry brands. Top brands like MSD, Flowmaster, Hurst, Accel, and many more make up the industry’s leading offering of enthusiast-driven products to deliver robust, complete performance solutions for builders, racers, and drivers. From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holley’s commitment to its customers and their cars is at the core of everything we do.