[StevoRocket]

If you use it as intended you'll probably find they go quiet.
The disks are iron and rust easily and there are two sides - one you cant see, and front and back too.
My Porsche 993 disks rusted badly on the inner face (half an inch track in the centre of the disk face). Caused by light use and not drying the disks off after washing the car.
The problem when you use them properly - especially if you track it - is the disk will show cracking starting at the drilled holes.
Then its time for Alcon front disks which last 5 times longer - with Pagid pads.