1979-85 Mustang Holley Carbureted Bypass Fuel Pressure Regulator by Holley

1979-85 Mustang Holley Carbureted Bypass Fuel Pressure Regulator

Easily adjust your 1979-1985 Mustang's fuel pressure with this carbureted bypass fuel pressure regulator from Holley!

Item #HLY-12803BP
MPN# 12-803BP

Everyday Low Price: $124.95

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  • Adjustable Fuel Regulation
  • Specific For Return Style Fuel Systems
  • For Carbureted Motors
  • Holley Quality


  • 4.5 to 9 PSI Adjustable
  • Preset to 7 PSI
  • Three 3/8" NPT Ports
  • Chrome Finish

 What's in the Box

  • (1) Fuel Pressure Regulator
  • (1) Mounting Bracket

Holley Fuel Pressure Regulator
Regulate the fuel pressure from the fuel pump to the carburetor in your 1979-1985 Mustang with Holley's bypass regulator! This regulator is specifically designed for your Mustang's return-style fuel system. Too much fuel pressure can cause flooding and driveability problems. You can adjust this regulator from 4-1/2 PSI to 9 PSI, and any unused fuel is bypassed to the fuel tank. Holley presets the regulator at 7 PSI from the factory so there's no guesswork after installation. 
Holley Quality
Holley is well known for quality engine parts and this fuel pressure regulator is no exception. This regulator is constructed from high-quality aluminum and polished to a chrome finish. The inlet, outlet, and return port sizes are 3/8" NPT. A new mounting bracket is included so you can mount the new regulator anywhere you'd like. This fuel pressure regulator is backed by Holley's standard 90-day warranty from the date of purchase. 

This product is intended for off-road use only, and is not legal for use in emission restrictive states. Off-Road Disclaimer

Holley Warranty - Click Here

  • Ford Mustang - 1979, 1980, 1981, 1982, 1983, 1984, 1985
Fitment Notice
  • 1979-1985 Mustang w/ Carburetor
  • This regulator does not include fitting for the ports. 
  • Not designed for use with Mechanical fuel pumps.

California Residents:
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About This Brand

Holley, The Heart & Soul of Performance.

For over 100 years Holley has been proven to be an industry leader by providing Mustang enthusiasts and racers with the high performance carburetors , intake manifolds, cylinder heads, and other quality performance components needed for today's competition. Holley's performance Mustang parts are perfect for any daily driven or high horsepower race car.
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