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Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminum for strength and durability. These regulators are adjustable from 4-65 psi and will handle both carbureted and EFI applications. A second pressure spring is included allowing you to increase the fuel pressure range up to 65 psi for EFI systems. They are offered with two port sizes, 3/8 NPT or 6AN to adapt to your new or existing fuel lines. So, if you are currently running a carbureted system but plan to upgrade to EFI in the future, these regulators will have you covered either way. Adjustable from 4.5-9 psi for precise fuel pressure adjustments Constructed of billet aluminum with a black anodized base and clear anodize top for good looks Used in systems where a return line is not needed Includes fitting for manifold reference Includes an 1/8 NPT gauge port Fit type: Universal Fit UPC 090127734988 ASIN B01JP2IUIC Fit Type Universal Fit Brand Name Holley Unit Count 1.0 Count Item Weight 0.5 Kilograms Manufacturer Holley Model Number 12-880 Body Material Aluminum Material Type Plastic Mounting Type Flange Mount Product Grade New Product Style Traditional Connector Type 6AN, 6AN or 3/8 NPT Item Type Name Holley Performance 12-880 Adjustable Billet By-Pass Fuel Regulator, Black (12880) Operation Mode ON-OFF Item Dimensions 5.3 x 5.3 x 2.8 inches Specification Met Carb/EFI, Durability Standards Auto Part Position Unknown Automotive Fit Type Universal Fit Included Components Holley Performance 12-880 Adjustable Billet By-Pass Fuel Regulator, Black (12880) Inlet Connection Size 0.38 Inches Inlet Connection Type 6 AN O-Ring Outlet Connection Size 0.38 Inches Outlet Connection Type 6 AN O-Ring Manufacturer Part Number 12-880 OEM Equivalent Part Number 12-880 Manufacturer Warranty Description Warranty Global Trade Identification Number 00090127734988