ADJUSTABLE FUEL PRESSURE REGULATOR Adjustable from 20 psi to maximum fuel-pump capacity Patented replaceable discharge ports let you match regulator output to the output of any fuel pump-;stock or aftermarket! Ensures consistent pressure and flow-;supports enough fuel flow for engines over 1,000 HP Premium 6061 T-6 billet aluminum. Laser-etched graphics. Regulators are intended for race or off-road use only; they're not intended or applicable for highway use and are not legal for sale or use on California pollution-controlled cars. Regulator mounts directly to stock or AEM high-volume fuel rail (sold separately). Tapped base accepts stock barb fitting or an AN fitting.