I have a 2005 325Ci and I'm going to need brakes soon and I have a coupe of questions. 1 if the rotors aren't damaged do they need to be replaced when you replace the pads? 2 Can original rotor be cut or resurfaced? I get e-mails from Auto Parts Warhouse and they have crossed drilled brake kits (rotors, pads, senors) all four wheels for $320 has anyone tried them? Powerstop K872 Brake Disc and Pad Kit- Cross-drilled and slotted.