Hey guys...not sure if any of you guys have experienced this, but lately I've noticed an odd sound coming from what seems like the engine bay. On acceleration, as soon as I hit over 3k rpm, I hear a strange fluttering/rattling sound coming from the engine bay. It almost seems as though it's intake related, but what the heck do I know. I've got an icebox intake (comptech) and it's never given me problems before, but since I've got over 100k miles, I'm not sure if I should start preparing myself for some costly repairs. Any thoughts?

Thanks!