CRC Clean-R-Carb Carburetor Cleaner 12oz Aerosol 50 State Formula Application Info: CRC Clean-R-Carb Carburetor Cleaner - 12oz Aerosol (50 State Formula) Instantly dissolves deposits on venturi, linkages, butterflies and PCV systems to improve fuel system performance and enhance fuel economy. Harmless to catalytic converters and oxygen sensors. Meets ALL state & federal VOC regulations. A carb & choke cleaner designed to maximize carburetor performance. Meets all 50 states emission standards. APPLICATIONS: Automatic chokes, carburetor components, crankcase breather element, exhaust gas recycling valve (EGR), general purpose cleaner for non-painted surfaces, heat risers, intake parts, positive crankcase ventilating system including PCV valve.