This Holley double adjustable fuel pressure regulator is designed for belt or cable driven pumps where fuel flow changes with engine RPM. Machined from billet aluminum, it uses a strategically placed idle adjustment design so no ports are blocked, retaining true 2-port flow, and is compatible with alcohol and E85 applications.
Specifications:
- Application: Universal
- Color: Black Anodized
- Fuel System: Carbureted
- Fuel Type: Gasoline, Diesel
- Inlet Size: 10 AN ORB
- Outlet Size: 10 AN ORB
- Material: Aluminum
- Pressure Range: 4-9 PSI
- Style: Double Adjustable
- Product Type: Fuel Pressure Regulator
- Part Number: 12-883
Compatible with Diesel #1 and Diesel #2. Features individual adjustment settings for idle and wide-open throttle, allowing fuel pressure adjustment at idle to help prevent flooding at low RPMs, while WOT settings help prevent fuel starvation at the top of the RPM range.
FAQ
What is this regulator designed for?
It's designed for belt or cable driven fuel pumps where fuel flow changes with engine RPM, and is compatible with alcohol and E85 applications.
Can idle and wide-open throttle pressure be set separately?
Yes, it features individual adjustment settings for idle and wide-open throttle to help prevent flooding at low RPM and fuel starvation at high RPM.
What fuels is it compatible with?
It's compatible with gasoline, diesel (#1 and #2), and alcohol/E85 applications.

