Holley 12803BP Carbureted Bypass Regulator with Return Port

4-1/2-9 PSI; 3/8 Inch NPT Inlet/Outlets; Gasoline; Natural; Aluminum; With Mounting Bracket

The Holley 12803BP carbureted bypass regulator is designed to help maintain consistent fuel pressure in performance fuel systems. Its bypass-style design routes excess fuel back to the tank or fuel cell, helping reduce pressure fluctuations and support stable fuel delivery for carbureted applications. The regulator is identified by Holley part number 12803BP and is suited for builders who need reliable pressure control in a return-style fuel system.
The return-style configuration can help improve fuel circulation while reducing the chance of fuel heat buildup under demanding operating conditions. This makes the Holley 12803BP a practical choice for street performance vehicles, race vehicles, and custom fuel-system installations that use a compatible carburetor and fuel pump. Proper installation should follow the fuel system manufacturer’s recommendations, including the use of appropriate fittings, fuel lines, and a correctly sized return path.
Feature: Bypass-style fuel pressure regulator for carbureted fuel systems. Feature: Return-port design supports routing excess fuel back to the tank or fuel cell. Feature: Helps promote consistent fuel pressure and dependable fuel delivery. Feature: Suitable for performance street, racing, and custom applications. Feature: Holley 12803BP part number provides straightforward product identification. Verify system compatibility and required fittings before installation.

Features:

• Bypass-style fuel pressure regulator for carbureted fuel systems

• Return-port design supports routing excess fuel back to the tank or fuel cell

• Helps promote consistent fuel pressure and dependable fuel delivery

• Suitable for performance street, racing, and custom applications

• Holley 12803BP part number provides straightforward product identification