This Holley billet fuel pressure regulator kit is precision machined from 6061-T6 billet aluminum and adjusts from 4-65 psi, handling both carbureted and EFI applications. The bypass, return-style design comes with 3/8 NPT ports plus a fuel pressure gauge and adapter fittings to get the installation started.
Specifications:
- Product Type: Fuel Pressure Regulator
- Style: Bypass (Return Line)
- Adjustable Range: 4-65 PSI
- Fuel System: EFI/Carb
- Fuel Type: Gasoline
- Inlet Size: 3/8" NPT (Female)
- Outlet Size: 3/8" NPT (Female)
- Return Size: 3/8" NPT
- Material: Billet Aluminum
- Finish: Black Anodized Base, Clear Anodized Top
- Includes: Fuel Pressure Gauge and Adapter Fittings
- Warranty: Manufacturer's Limited 90-Day Warranty
- Part Number: 12-879KIT
The 4-15 psi carbureted spring comes pre-installed, and a second spring is included to raise the range up to 65 psi for EFI applications; a boost reference fitting and 1/8 NPT gauge port are also included.
FAQ
What pressure range does this regulator cover?
It adjusts from 4 to 65 psi, covering both carbureted and EFI applications.
Does it come with a gauge?
Yes, this kit includes a fuel pressure gauge and adapter fittings.
What port size does it use?
It has 3/8 NPT inlet, outlet, and return ports.
Can this be used with EFI systems?
Yes, a second spring is included to extend the range up to 65 psi for EFI use.

