Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Too much fuel pressure from a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator. The Holley 12-803 fuel pressure regulator features 3/8" NPT in/out ports.
- Adjustable fuel regulation from 4-1/2 to 9 psi
- .220" (7/32") restriction
- 3/8" NPT ports (1 in, 2 out)
- Chrome Finish
- Mounting bracket included