Berryman 0101 B-12 Chemtool Carburetor, Fuel System and Injector Cleaner, 1-Gallon Can Contains 100% high-energy solvent technology Quickly dissolves gum, varnish, fuel residue, and carbon build-up Cleans carburetors, linkages, choke, PCV valve, and throttle body Better vehicle drivability and fuel economy NOT for use in VOC restricted States