Holley 12-880 Adjustable Billet By-pass Regulator-6AN SKU: 6669

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.

Adjustable from 4-65 psi for precise fuel pressure adjustments
Constructed of billet aluminum with a black anodized base and a clear anodized top for good looks
Used in systems with a return line back to the tank
(1) 6AN O-ring Inlet; (1) 6AN O-ring Outlet; and (1) 6AN O-ring return
Includes fitting for manifold reference
Includes an 1/8 NPT gauge port
Boost Reference - 1:1
The 4-15 psi carbureted spring comes installed in the regulator