I started noticing a slight rattle coming from what appears to be the general vicinity of the turbo. I can only hear it when I'm cruising on the highway and get under slight boost (1/4 of the boost gauge). I'm a little concerned because of the location of where its coming from as it doesn't appear to be from inside the car... anyone else experience this? I dont think this is normal as I've had my car for a couple of years now and just started hearing it.