Gunk M4816 Complete Carburetor Parts Cleaner Kit - 12 oz. GUNK is a local family owned company based out of Charlotte, NC. For more than 75 years, GUNK products, developed by the people who use them, has earned the trust of hard-working tradesment and the active DIYer through consistent, superior performance and a commitment to innovation. Maintains carburetor and fuel injector efficiency Will not harm catalytic convertors or oxygen sensors Can be used with leaded or unleaded gas Keeps carburetor and fuel injector system clean while you drive