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Holley Regulator Rebuild Kit Fits 12 840 and 12 842 Fuel Pressure Regulators HASZ20RP 1970 1986 Chevrolet Monte Carlo PQX1835005 1970 1986 Chevrolet Monte Carlo The Triple Dog Gauge Tuner or GT is four products in one For over a century Holley has driven the cutting edge of fuel system design That work continues today through Holley’s market leading EFI products as well as through Holley’s family of best in industry brands
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