CRC MAF & Throttle Body Single-Use Twin Pack, 1 Kit The first product specifically developed to clean mass air flow sensors Designed with advanced Cozol technology Increases horsepower & improves air/fuel ratio and MPG Cleans gum & varnish from the throttle valves & throttle body for easier starting Application: Mass air flow sensors & housing and fuel injected gasoline engines (both throttle body & multi-port)