I've had this annoying rattle for a few months now, and I've eliminated every probably cause. I dampened my foglights that I mounted on the bumper, I checked the engine for lose brackets, I even removed my bug guard.

This rattle occurs when the engine is at high RPM (2500 or above), but only when the car is coasting (no clutch, no throttle).

The noise seems to be coming from the fire wall near the top of it. I removed the windshield cowling and checked for stones that might of been trapped inside (there were none).

I just tried replicating the noise while stationary in neutral, and I was successful. Because the noise happens when the vehicle isn't stationary I can rule out suspension. I shot a video of the noise from the interior (occurs at 7 and 11 sec mark).

I also did a recording in the engine bay, but it's harder to hear the noise. In the video it doesn't sound too bad, but it's worse in person (especially on the highway).

My main questions are, does this sound like something that could come from the engine directly?

Why does this noise only occur once I let off the throttle?