I think it might be the rubber "seal" coming apart a little. it got worse when I put in my forge valve and boost gauge, which pushed a tiny bit of the plastic up a small amount. that's my guess. could be dirt.
ok so its rubber seal grinding ot the plastic should I take of the plastic cover form intercooler?? you can se its missing like half of an inch??anyone had this problem?? do you think it will gone when i instal motor mount??
If you look at the bottom of your hood you will see a piece of foamish type of material about 4in by 8in that is there as a rub guard. The magic dust is the foamish material wearing off. Just look up and you will see where it is worn.