Holley 12-879 Adjustable Billet By-Pass Fuel Regulator Adjustable 4-65 psi. 3/8 in. NPT Outlet/Inlet Boost Reference 1 To 1 EFI Bypass Style Black Anodized Base/Clear Anodized Top Adjustable Billet By-Pass Fuel Regulator

• Holley Performance 12-879 Adjustable Billet By-Pass Fuel Regulator; Adjustable; 4-65 psi.; 3/8 in. NPT Outlet/Inlet; Boost Reference 1 To 1; EFI Bypass Style; Black Anodized Base/Clear Anodized Top;
• Black
• Holley
• 12-879
• Warranty: Yes

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. 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.