Compact High-Flow EFI Fuel Pressure Regulator

The GFB FX-R fuel pressure regulator is engineered for electronic fuel injection systems that require stable, boost-referenced pressure control in a compact form factor. It is intended for custom and performance fuel systems using a return-style layout.

-6AN Port Configuration

The FX-R features -6AN inlet and return ports along with a 1/8” NPT port for a mechanical gauge or ECU fuel pressure sensor, making it easy to integrate into performance fuel plumbing.

Adjustable Base Fuel Pressure

Base fuel pressure is fully adjustable, allowing the regulator to be matched to different injector sizes, fuel pumps and tuning requirements commonly found in EFI applications.

1:1 Boost Reference

A manifold reference port provides a 1:1 fuel pressure rise rate under boost, maintaining consistent injector differential pressure as manifold pressure increases.

Internal Sealing and Pressure Retention

The FX-R uses a Teflon co-polymer valve seat and a spherical stainless steel valve to improve sealing and help retain fuel pressure after engine shut-down, assisting with hot restarts.

Reinforced Diaphragm Design

A double-layer, reinforced diaphragm provides durability and resistance to pressure spikes, contributing to long-term reliability in performance environments.

Fully Serviceable Construction

The regulator is completely serviceable, allowing inspection or maintenance as part of long-term vehicle ownership or motorsport use.