Holley 12-704 Big Port Adjustable Fuel Pressure Regulator, 4.5-9 PSI
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Q & A
What's in the Box
This universal fuel regulator regulates pressure from 4-1/2 to 9 PSI. This fuel pump regulator has one 1/2" NPT inlet and two 1/2" NPT outlet ports. Works with low pressure carbureted systems and as an alcohol fuel regulator.
- Includes mounting hardware and AN style fittings
- Alcohol compatible
- .437" (7/16") restriction
425-12704 Instructions (PDF)
Item Details4-1/2 to 9 psi
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These adjustable fuel pressure regulators from Holley can be adjusted from 4-1/2 to 9 PSI to regulate fuel pressure for various types of carburetors. Fuel pump regulator works well with Holley high performance fuel pumps. Use one fuel regulator per fuel bowl for high flow applications.
This fuel pressure regulator has a 3/8" NPT gauge port and requires reducer 617-6157 to install a fuel pressure gauge.
427-12803 Instructions (PDF)
A stock fuel regulator may be fine for some, but they are not designed for performance or adjustability. The Aeromotive A1000 rising rate fuel pressure regulator allows you to adjust fuel pressure from 40-75 PSI and has a 1:1 boost referencing ratio if needed. EFI fuel pressure regulator has two -6 AN female O-ring inlet ports, and one outlet. There is also a 1/8" NPT port to mount a pressure gauge if desired.
- Base pressure adjustable from 40-75 PSI
- Gasoline and alcohol compatible
- Fuel pressure rises on a 1:1 ratio with boost
- 1/8” NPT gauge port
- Provides (2) ORB-06 inlet ports and (1) ORB-06 return port
- Bypass fuel pressure regulator
910-13109 Instructions (PDF)