^:iagree: especially with the best practice of replacing rotors with pads - also you may need to re-bed the pads as a lot of times its uneven bedding and transfer material causing the "warping"

i think thats what happened cause when i had the pads changed the mechanic said my rotors were fine but i should change them and that would be an extra $280. i told him no thanks so on the highway ride home i have no vibration but after a couple days i went on the highway and when i gave it a hard brake, it started vibrating like crazy. when i called the mechanic he sarted saying "i told you to change the rotors, the cheap pads you bought warped your rotors". the "cheap pads" i bought were centric posi-quiets.when i went out and looked at the rotors. i can see it has little specs on it

^I hope that $280 your mechanic was quoting to change the rotors was at all 4 corners and was a premium type of rotor lol