Holley 12-889 EFI Diecast Filter Regulator, -8 AN

Simplify your return-style EFI fuel system with the Holley EFI 12-889 Diecast Filter Regulator. This all-in-one assembly combines a fuel filter and bypass fuel pressure regulator into a compact die-cast aluminum housing, helping reduce fuel line complexity and streamline installation. Designed to mount near the fuel tank, it shortens return-line routing and creates a cleaner, more efficient EFI plumbing setup.

The integrated regulator is preset to 59.5 PSI, making it ideal for many EFI applications right out of the box. A built-in 10-micron fuel filter helps protect injectors and fuel system components from contaminants, while -8 AN O-ring ports provide compatibility with a wide range of performance fuel systems. The durable clear and black anodized die-cast aluminum construction offers both corrosion resistance and a professional appearance.

• Combines a fuel filter and pressure regulator into one compact assembly
• Preset 59.5 PSI regulator is ideal for return-style EFI fuel systems
• Integrated 10-micron filter helps protect injectors from contaminants
• -8 AN O-ring inlet and outlet ports fit many performance fuel setups
• Die-cast aluminum housing with clear and black anodized finish for durability and corrosion resistance

Installation Instructions (PDF)