This is the only four-port regulator on the market that uses a "soft seat" design, eliminating pressure creep at idle and on the throttle stop. Used by many of the best "Super Class" racers in the country. Adjustable from 5-15 PSI.
This exclusive design ensures precise pressure control, resulting in more consistent E.T.s. The A4 Carbureted Regulator was engineered for use with our A2000 Fuel Pump.