Holley Double Adjustable Fuel Pressure Regulators

Holley double adjustable fuel pressure regulators are designed for belt or cable driven pumps where fuel flow changes with engine rpm. Made from billet aluminum, they are offered in 2-port and 4-port models to complete your fuel system requirements, and the idle adjustment design is strategically placed so that none of the ports are blocked, like other designs. Features include: * Compatible with E85 and alcohol * Individual adjustment settings, one for idle and wide open throttle * Fuel pressure adjustability at idle can help prevent flooding at low rpms * Wide-open throttle settings help to prevent fuel starvation at the top end of the rpm range Show Less