EFI Filter Regulator 3/8npt Ports 175GPH

The Holley EFI Filter Regulator 3/8npt Ports 175GPH is a critical fuel system component designed for modern electronic fuel injection engines that demand precise pressure control and clean fuel delivery. Built for high-performance applications, this in-line regulator serves fuel-injected gasoline engines where consistent pressure stability directly impacts engine performance, efficiency, and reliability. Whether you're building a custom EFI system, upgrading a classic car with modern fuel management, or maintaining a performance vehicle, this regulator ensures your fuel system operates within manufacturer specifications.

This regulator features a fixed 60 psi pressure setting, ideal for most EFI applications where consistent fuel delivery is non-negotiable. The integrated 10-micron filter element protects fuel injectors from contamination and debris, extending injector life and maintaining spray pattern integrity. All three ports accept 3/8-inch NPT female connections—inlet, outlet, and return—allowing flexible installation in fuel rail systems and return-line configurations. Constructed from anodized aluminum in black and clear finish, the housing resists corrosion while the internal design maintains accuracy across the 175 GPH flow capacity, making it suitable for moderate to aggressive engine builds without fuel starvation.

Hobbyists and professional technicians rely on this regulator for retrofit EFI conversions, stroker engine upgrades, and fuel system rebuilds where OEM precision is required. The compact 4.4 x 4.3 x 8.7-inch profile and lightweight 1.8 lbs design make it ideal for tight engine bay installations. Verify 3/8 NPT compatibility with your fuel line fittings and fuel rail design before installation; this regulator works best in systems with dedicated return lines and proper fuel pump sizing to handle the 175 GPH specification.