Fuel Pressure Regulator Zinc Alloy 1-4 PSI 3/8 Inch NPT Port 12-804 for Edelbrock Carburetors Feature: 1. Application: The carb fuel pressure regulator is professionally designed for Holley carburetors and Edelbrock carburetors, 3/8 inch NPT port (1 inch in, 2 out). 2. OE Number: 12-804 is a reference part number that can match perfectly. Please check your OE number carefully before ordering. 3. Usage: The fuel pressure regulator is designed to control the fuel pressure from the fuel pump to the carburetor, based on your carburetor and vehicle application. 4. Function: The fuel pressure regulator regulates fuel pressure to prevent valve needle and pressure overload, which can cause overfilling or driveability problems. 5. High-strength material: The carb fuel pressure regulator is made of premium zinc alloy material, rust-resistant, sturdy and durable, long service life. Specification: Product Type: Fuel Pressure Regulator Material: Zinc Alloy OE: 12-804 Adjustable Fuel Adjustment Range: 1-4 psi, 0.220 inch (7/32 inch) Restriction Port Type: 3/8 inch NPT Port (1 in, 2 out) Fitment: For Holley Carburetor For Edelbrock Carburetors Packing List: 1 x Fuel Pressure Regulator 1 x Mounting Bracket 5 x Screw 1 x Seal Note: 1. Please double check the part number of your item, the corresponding information is for reference only. 2.