Go Fast Bits FX-S Fuel Pressure Regulator with 1/8" NPT ports

The Go Fast Bits (GFB) FX-S Fuel Pressure Regulator is a compact, versatile solution for controlling fuel pressure with factory-like reliability and high-performance capability. Designed for EFI fuel systems, the FX-S is suitable for a wide range of fuels including unleaded, ethanol, methanol, and diesel, making it ideal for both street and motorsport applications.

Featuring 4x 1/8” NPT body ports and 1x 1/8” NPT return port, the FX-S supports multiple configurations — whether you need inlets, outlets, pressure gauges, or ECU sensor connections. It flows up to 750 LPH at 25 PSI, providing ample capacity for single or multi-pump setups.

Engineered with a replaceable Teflon co-polymer valve seat and spherical stainless valve, the FX-S seals securely, holding fuel pressure after shutdown for easier starts compared to conventional regulators. Reinforced double-layer diaphragms deliver a burst strength of over 500 PSI, ensuring durability under extreme conditions.

With an adjustable static pressure range of 25–80 PSI, the FX-S provides flexibility for tuning, while its 1:1 fuel pressure rise rate maintains consistent performance under boost. Completely serviceable and CNC precision-built, this regulator is a compact powerhouse for modern performance engines.

Key Features:

• High-quality EFI fuel pressure regulator, flows up to 750 LPH @ 25 PSI

• 4x 1/8” NPT body ports for flexible fuel in/out, gauge, or ECU sensor setups

• 1x 1/8” NPT return port for system integration

• Adjustable static pressure: 25–80 PSI

• 1:1 fuel pressure rise rate for boosted applications

• Teflon co-polymer seat & stainless valve — holds pressure after shutdown

• Double-layer reinforced diaphragms with >500 PSI burst strength

• Works with unleaded, ethanol, methanol, and diesel

• Fully serviceable for long-term reliability

• Compact design for flexible installation in tight engine bays