Fuel Pressure Regulator (Bosch Rail Mount Replacement)

Adjustable fuel pressure for your factory rail

The GFB FX-S 8051 replaces the Bosch-style clip-in regulator, giving you adjustable fuel pressure without replacing the entire fuel rail.

Vehicle fitment

• 1999–2004 Ford SVT Lightning with the OEM fuel rail
• 2002–2003 Ford Harley-Davidson F-150 with the OEM fuel rail

Confirm your fuel rail and regulator configuration before ordering, especially if your fuel system has been modified.

Features and specifications

• Manufacturer part number: GFB 8051
• Adjustable static pressure: 1.4–5 bar (20–72 psi), subject to pump flow and return-line restriction
• Compatible with gasoline, ethanol, and methanol
• 1/8-inch NPT port for a fuel pressure gauge or sensor; supplied plug closes the port when unused
• Increased flow capacity for upgraded fuel pump applications
• Reinforced diaphragm and serviceable construction
• Teflon copolymer valve seat and stainless valve help retain pressure after shutdown

Optional accessories

Choose from the available gauge and mounting options above to match your installation.

Watch the GFB FX-S product overview