I was curious to how long the stock brake rotors last before they need turned or replaced. Now I know alot has to do with the way you drive, but my rotors pulse whenever I get on my brakes hard. I only have 24,000 miles on my car. Could I have warped them? I do drive hard sometimes and have had the 130mph to 65mph instant slowdown , aka state police sitting in the middle of the highway. I am just curious to hear from other WRX owners and see if thye have the same problem. Thanks.