I just replaced my front rotors and brake pads about 4 months ago in my 97 GSR. When I brake now, my car vibrates like it did prior to replacing the rotors, the problem went away for a couple of months and has been getting slowly worse. Is this for sure my rotors or could it be caused by some other problem? The rotors are only 4 months old like I said, why would they be warped again already? Anyone have any ideas or should I just order some new rotors from Colletti? Thanks!