Hi all, I've searched this site and google, and haven't found any answers to a sound I'm getting in my 2002 Manual, only mods are springs, BRZ Diff, and HKS exhaust. Consistently right at 3K RPMs and on, I am getting a very faint sound that appears to be coming from behind the drivers side dash or maybe engine bay. Best way I can describe is that it sounds like a noisy computer when it's processing. It doesn't sound like a typical dash rattle, although you could describe it as a faint rattle. Any thoughts? My mechanic said he wouldn't be able to figure it out unless it gets louder.