1st Gen - Engine, ...
bI've seen this video of how to install Mugen intake on CL9
https://www.youtube.com/watch?v=ehzJRL2jrGM
And please notice the parts they have installed at min: 2:42 , (step 12, block off plate install ) and min 3:44 (step 15 , install Intake Duct) .
I'm wondering what is the reason for...