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Holley Low Pressure Regulator for Weber Carbs

Unlike four barrel carburetors, Weber carburetors are designed to flow a lot of fuel at a much lower pressure.  The maximum recommended fuel pressure is 3.5 psi, and this regulator is the correct one.  It looks identical to Holley’s standard 4-9 psi regulator, but it is for applications requiring 0-4 psi.  This regulator is the right choice for use with all Weber carburetion systems.