CRC GDI IVD Intake Valve Cleaner is your solution for harmful carbon deposits in your GDI engine. Instead of paying for an engine teardown to clean intake valves, just spray this cleaner directly into your air intake system. A powerful chemistry hits the backs of the valves at 150 times the concentration of fuel additives, getting to where other products just can’t reach. It removes up to 23% of carbon buildup within the first hour of use. Save time, money and restore performance with CRC GDI IVD Intake Valve Cleaner.