This Holley fuel pressure regulator precisely controls fuel pressure between the fuel pump and carburetor. Excess pressure for a given needle-and-seat assembly can cause flooding or drivability issues, so this fully adjustable regulator is factory pre-set and ready to fine-tune to your engine's needs.
Specifications:
- Category: Air and Fuel Delivery
- Pressure Range: 4.5-9 PSI, Adjustable
- Inlet: One 8 AN O-Ring Port
- Outlet: Four 6 AN O-Ring Ports
- Restriction: 0.437" (7/16")
- Material: Aluminum, Hard Coat Anodized
- Style: Non-Return
- Fuel Compatibility: Gasoline
- Product Type: Fuel Pressure Regulator
- Warning: California Proposition 65
- Warranty: Manufacturer's Limited 90 Day Warranty
- Part Number: 12-707
Per Holley's data this regulator is also compatible with Diesel #1 and Diesel #2 fuel. Includes mounting hardware, AN fittings, and three fuel pressure gauge mounting options (gauge not included).
FAQ
What is the adjustable pressure range?
4.5 to 9 PSI.
How many outlet ports does it have?
Four 6 AN O-Ring outlet ports, plus one 8 AN O-Ring inlet port.
Is a fuel pressure gauge included?
No, but three gauge mounting options are provided.
What fuels is it compatible with?
Gasoline, as well as Diesel #1 and Diesel #2 and methanol/alcohol per Holley's specifications.

