rdsx18

Ok so this has been going on for a while, but since I don't drive my car in the winter I waited until now to ask about this. When I am going along at highway speed, I get a metallic noise coming from the dash once I break 80-85 mph. I slow down and on decel I can hear it, cruising it only happens on bumps, and on accel I can hear it too, but here's the thing, it only happens above 75ish, any slower and I almost never hear it. I don't know what it is, but it is quite aggravating because it is not too loud, but just loud enough. I do not think it is the separator plate, and this happened before I swapped my cams so that rules out any install errors there. Any ideas?

rdsx18

Nobody has any ideas?