This 11 oz can of CRC Mass Air Flow Sensor Cleaner and 12 oz can of CRC Throttle Body and Air-Intake Cleaner complement each other to thoroughly clean your vehicle's engine and improve performance. The Mass Air Flow Sensor Cleaner is specifically designed to clean mass air flow sensors using advanced Cozol technology. It increases horsepower, improves air/fuel ratio, and boosts MPG. The plastic-safe formula dries in seconds and helps engines start easier while eliminating hesitation and rough idle. The Throttle Body and Air-Intake Cleaner provides deep cleaning of throttle body build-up caused by carbon, varnish, and gum deposits. It is safe for use in all fuel-injected gasoline engines and helps them start easier and run smoother by eliminating hesitation and rough idle. With one cleaner tailored to mass air flow sensors to increase horsepower and MPG, and another formulated to deeply clean throttle bodies and air intakes, improve starts, and smooth performance, this bundle offers a comprehensive engine cleaning solution. Increases horsepower and improves airfuel ratio and MPG with 11 oz. of specially formulated mass air flow sensor cleaner. Includes 12 oz. of deepcleaning throttle body and air intake cleaner to eliminate hesitation and rough idle. Bundle improves performance and fuel efficiency for all fuel injected gasoline engines. Mass air flow sensor cleaner plastic safe and dries in seconds. From CRC Industries, a market leader in specialized chemical solutions for vehicles and equipment.