Fuel Press Reg EFI 25-90psi 6AN/6AN

The FUELAB Fuel Pressure Regulator EFI 25–90 PSI with dual 6 AN connections is a precision fuel management component engineered for EFI systems running gasoline, diesel, E85, or methanol. This in-line regulator maintains stable fuel pressure across a wide operating range, essential for consistent fuel delivery and engine performance in turbocharged, supercharged, or naturally aspirated applications where factory fuel systems have been modified or replaced.

Constructed from black anodized aluminum, the 51502-1 model features two 6 AN female inlet ports for supply and return lines, plus a 1/8 inch NPT port for vacuum reference or gauge installation. The adjustable 25–90 PSI range accommodates high-flow fuel pumps and variable fuel demands without requiring multiple regulators. Anodized finish provides corrosion resistance in engine bay environments, while the compact footprint (4.95 x 2.9 x 5.05 inches) integrates readily into custom fuel system layouts. The dual 6 AN inlet configuration ensures balanced pressure regulation and simplifies plumbing on systems with dedicated return lines.

This regulator serves engine builders, performance enthusiasts, and fabricators upgrading fuel systems on modified vehicles. Fuel pressure stability is critical for modern EFI tuning—inconsistent pressure causes lean conditions, detonation, and drivability issues. The wide 25–90 PSI band supports everything from low-pressure street applications to high-boost racing setups without compromise. Compatibility across multiple fuel types (gasoline, diesel, ethanol blends, and methanol) makes it versatile for diverse fuel system designs and alternative-fuel conversions.

FUELAB fuel systems are recognized for precision manufacturing and reliable performance in competitive and street-driven platforms. The 6 AN connection standard (1/2-inch port size) is industry-standard for high-flow fuel systems, ensuring compatibility with aftermarket fuel rails, pumps, and distribution blocks. Including the 1/8 inch NPT reference port allows installation of fuel pressure gauges or vacuum lines for real-time monitoring and tuning optimization.