CRC Mass Air Flow Sensor Cleaner is the safe and effective alternative to "underground" methods of MAF sensor cleaning. Dont us aggressive chemicals like brake parts cleaners or carburetor cleaners on MAF sensors. These can cause serious damage to sensitive parts. Use CRC MAF Sensor Cleaner -- Its the right product for the job! It safely and easily cleans the MAF hotwires and electrical components without damage to the wires or plastic housing. Cleaning is simple safe and fast. The whole job should take less than 10 minutes! Benefits and Features: Safely cleans and protects MAF Sensors. Plastic-safe and leaves no residue. Increases horsepower. Decreases hesitation and pinging. Improves fuel economy and MPG. Reduces rough idle. Use every time you clean or change your air filter. SHIPPING: This item cannot be shipped via 2nd Day Air. Can only ship in the 48 Continental United States.