That will drown out all the squeaking noises.
Was it an IS350 F-Sport that you drove? If so, this is why it sounded like it did,
Adding the KN drop in filter adds a little more turbo noise (I personally like it) or you could just remove the foam from the bottom of the paper filter and get some what similar results in noise (did this in our XC60 and it made the intake sound a bit louder).Has anyone successfully done anything on the induction side of things? I know intake options are almost non existent but does a switch to an aftermarket panel filter (or any other airbox mod) add a little more growl or spool sounds?