How to Clean GDI Intake Valves in 1 Hour with CRC GDI IVD® Intake Valve & Turbo Cleaner Do you want to remove carbon buildup from the intake valve of your GDI engine without the expense of a costly tear down? RC GDI IVD® Intake Valve & Turbo Cleaner uses a specialized formula to break down carbon deposits that choke your vehicle’s performance. Regular cleaning with CRC GDI IVD® Intake Valve & Turbo Cleaner will increase power and torque, stabilize rough idling, solve starting problems, and reduc