Aeromotive Adjustable Fuel Pressure Regulator X1 Series EFI Standard Bypass



  • 35-75 PSI Adjustable
  • For Gas/ E85/ Alcohol/ Diesel
  • Handles Up To 150GPH
  • USA Made

Aeromotive X1 Series EFI Standard Bypass Adjustable Fuel Pressure Regulator.

From carbureted to EFI pressures, naturally aspirated or forced induction, the X1 Bypass Regulator (13303) from Aeromotive will serve your fuel system well. It is designed to span the entire range of low and high pressure applications, providing the dependable fuel flow and pressure control you’ve come to expect from Aeromotive.

Features and Benefits:
- Base fuel pressure adjustable from 35-75 PSI
- Vacuum/Boost reference capability
- 1:1 rising rate for forced induction engines
- Gasoline, ethanol, alcohol and diesel compatible
- 2 – ORB -08 inlet/outlet ports on the sides
- 1 – ORB-08 return port on the bottom port
- 1 – 1/8″ NPT Gauge Port with plug
- 1/16″ NPT Boost Port with 5/32″ hose barb
- 0.188″ bypass with matching spring and poppet
- Handles up to 150 GPH with AN-08 return line
- Suitable for any Aeromotive Pump up to A1000
- Mounting bracket included (not shown)
- Made in the USA

The X1 Series provides flexible performance that grows as your fuel system grows. You can easily switch back and forth between EFI or carburetor setups at will, without having to purchase another regulator. Simply get the correct conversion kit for your pump and pressure range (sold separately), and you can swap out the internal parts while leaving the regulator mounted and plumbed as is.

While versatility is one of the X1’s greatest assets, it is far from the only new design feature. Utilizing larger (3) -8AN ORB inlet/outlet/return ports to accommodate increased flow, at the same time Aeromotive reduced overall size and the weight by 33 percent.

The new X1 design eliminates the compromise common to other convertible regulator designs, with the optimization of all internal components including the diaphragm/poppet, spring and bypass seat, the X1 delivers all of the performance and features you expect from an application specific bypass regulator, regardless of what you decide to do with your induction system tomorrow. Above and beyond the expected performance, you still have the amenities like a 1/8” NPT gauge port and 1:1 ratio boost reference port for forced induction applications.

Tech Tip: Compatible with X1 High-Flow EFI Conversion kit (13014), X1 Carb Conversion kit (13014) and the X1 EFI Service Kit (13013).

Please Note: EFI Bypass Regulator is designed for use with Return-Style Systems ONLY.

California Residents: Proposition 65 Warning

Only for use on pre-pollution controlled vehicles: This product can be used on vehicles that were manufactured before emissions control regulations were imposed. Pre-pollution vehicles are defined as:

  • 1965 and older U.S. manufactured California certified vehicles
  • 1967 and older U.S. manufactured federally certified vehicles

Installation Difficulty


Intermediate skill is required for this installation.

Vehicle Fitment

This product will fit the following Bronco years:

This product will fit the following C10 years:

This product will fit the following F-100 years:

  • 1948,
  • 1949,
  • 1950,
  • 1951,
  • 1952,
  • 1953,
  • 1954,
  • 1955,
  • 1956,
  • 1957,
  • 1958,
  • 1959,
  • 1960,
  • 1961,
  • 1962,
  • 1963,
  • 1964,
  • 1965,
  • 1966,
  • 1967,
  • 1968,
  • 1969,
  • 1970,
  • 1971,
  • 1972,
  • 1973,
  • 1974,
  • 1975,
  • 1976,
  • 1977,
  • 1978,
  • 1979,

This product will fit the following Mustang years:

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