Delphi FP10481 Fuel Injection Pressure Regulator

Fuel Pressure Control for Subaru Applications

The Delphi FP10481 fuel injection pressure regulator is built for Subaru fuel systems that require stable pressure control and OE-style fitment. It uses a metal body, a push-in inlet, and a hose outlet to support consistent fuel delivery on select Subaru Outback, Impreza, and Legacy models.

Delphi draws on OE heritage and supplier experience to produce aftermarket parts with application-specific engineering. This regulator is specified for a 44 system pressure and is a direct-fit option for the listed Subaru fuel injection applications.

Key Features

• Brand: Delphi
• Part number: FP10481
• Fuel injection pressure regulator for air and fuel delivery systems
• Metal construction for durability in fuel system service
• Push-in inlet and hose outlet configuration
• 1 inlet port and 1 outlet port
• Bolt-mounted design
• System pressure: 44
• No gauge port
• Not adjustable

Detailed Description

The Delphi FP10481 is a fuel injection pressure regulator engineered for select Subaru fuel system layouts. It helps maintain the specified fuel pressure at the rail or delivery circuit, supporting proper injector operation and consistent engine fueling. This part number, FP10481, is listed for 1999-2004 Subaru Impreza, Legacy, and Outback applications, including 2000-2001 Subaru Legacy and Outback with manual transmission and 1999 Legacy and Impreza with California Emission System.

This part cross-references Dorman OE Solutions 800-576 for the same application. It also cross-references Standard Ignition PR464 for the same application.

What It Helps Address

• Fuel pressure that is too high or too low
• Hard starting caused by unstable fuel delivery
• Rough idle related to inconsistent injector pressure
• Fuel mixture issues tied to regulator wear
• Driveability concerns on Subaru Outback, Impreza, and Legacy fuel systems

Installation Notes and Tips

• Verify the inlet and outlet connection style before installation: push-in inlet and hose outlet.
• Confirm the vehicle’s fuel system specification matches the listed 44 system pressure.
• Check the application notes carefully for manual transmission and California Emission System coverage.
• Inspect fuel lines, seals, and mounting points before replacing the regulator.
• Use the exact vehicle fitment listing for 1999-2004 Subaru Outback, Impreza, and Legacy applications.

Quality Assurance

Delphi builds this regulator using OE experience developed through long-term supplier relationships with major automakers. That OE background is reflected in the application-specific design and material selection used in the FP10481.