Cleaning fuel injectors is only part of the solution. VPS INTAKE CLEANER cleans fuel system components that most fuel injector cleaners fail to reach. VPS INTAKE CLEANER is professionally installed using an installation tool and works with VPS Fuel Injector Cleaner to thoroughly clean intake valves, manifold ports and combustion chambers. VPS INTAKE CLEANER contains powerful cleaners to clean fuel induction systems and formulated to eliminate exhaust smoke. These powerful cleaners are injected directly into the induction system without being diluted with gasoline like cleaners added to the fuel tank. 12 per case.