The left side is the Ball Joint Protector Front Rotor Shield (should be one for each side). I cannot remember for sure if CCB cars are supposed to have these installed for track use but I DO think so. The original shield is to be removed, and these installed so that the front air deflectors have a path to send the air to the rotors.
The other plastic pieces are the rear lower control arm deflectors. I know for sure that CCB cars do not need these, as posted by Mirza. These are for steel brake cars only as they need the additional cooling. Again, this is for steel brake cars only.
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