I have installed new AP racing brakes on my coupe,front 14.25 and rear 13. But I am totally frustrated by the rear brakes. They are really really really noisy, I can also hear low squeaking even I do not take brake. Does anyone have a way to solve the problem. I know it is because the marerial of the rotors and pads. Is there a kind of new pads made of better material but noise-free available for my brake?