What should you use to clean intake manifold and the injectors?

To clean the intake manifold and fuel injectors, it's effective to use a specialized intake cleaner or fuel injector cleaner, which can dissolve carbon deposits and residues. For the intake manifold, you can use a throttle body cleaner or a similar solvent that is safe for the materials involved. Additionally, some people opt for ultrasonic cleaning for injectors, which provides a thorough clean without damaging the components. Always ensure you follow the manufacturer's recommendations for cleaning products to avoid any potential damage.