Carb Fuel Pressure Regulator Weber Holley Kadron Dellorto Solex CarburetorNew fuel pressure regulator. If you are wanting to adjust your pressure so you do not blow past the needle and seat, this is a great product. Features: Adjusts from 1 to 5. 5 PSI Non fuel injected Includes 1 4", 5 16, and 3 8 barb fittings Assures constant fuel pressure and prevents surges This is a great fuel pressure regulator if your stock or aftermarket carb is loading up or you are going to a different fuel pump. It simply installs inline to