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Return to Parts List Category : D- Big Block (Low Deck) : Fuel System (Excluding Intakes & Carbs) : Miscellaneous QFT 30-804 FUEL PRESSURE REGULATOR $41.35 Based on the same technology as our 30-803 fuel pressure regulator, our new low pressure regulator is built with premium components and designed to operate within the 1-4 PSI range. Includes mounting bracket and detailed instructions. 3/8" NPT ports.