intercooler and pod filter, u only can have one. all air intake system, max u can modified is one part, if u modified two parts from the air intake system, its illegal.
man, every time if u has been defected or pull overed, don't just get the fine and go away, ask any question about ur car to police. make sure u know what they are thinking. then you will know what they don't like.
I just asked my friend, he said if your car had minor,u can stick the yellow paper on ur windscrean, and u won't get any reasonable defect again before the deadline date.