Kit contains the most complete, single-use gasoline fuel system cleaning and maintenance program for professional tune-up service providers without the need for expensive, complicated equipment. Formulated with H.E.S.T. and powerful detergents to maximize cleaning. Easy-to-use kit contains Step 1 Air-Intake Cleaner (aerosol), Step 2 Combustion Chamber Cleaner with installation tools, and Step 3 Fuel System Cleaner. Includes instructional DVD.