Gumout Foaming Intake Valve and Turbo Cleaner with Carbon Clear deep cleans GDI (Gasoline Direct Injection) / PFI (Port Fuel Injection) intake valves, as well as, the throttle body, intake ports, fuel injectors and combustion chambers, and/or turbo compressor and turbine to restore fuel economy and maximize horsepower. Removing carbon and fuel deposits from gasoline engine's intake valves, intake ports and turbos is essential to ensuring optimal vehicle performance.