Catalytic converter and Intake manifold service "For lecturer inspection video"

This video shows that how students preforming on how to servicing the intake manifold from the engine's intake system and catalytic converter from the vehicle's exhaust system. The service include how to clean and inspect the condition.
This video is for Despark Collage's lecturer who need to inspect the students performance and action on the task in the video. This video also be public, everyone are allowed to watch and enjoy.
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