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Hi I was hoping I could get some input from some of you experts. I have had about 5 track days on my stock 135i front caliper pistons and boots. I've been experiencing vibration while on the brakes at higher speeds. I have replaced the pads and rotors multiple times and the problem manages to come back every time. Could the issue be due to the stock caliper pistons sticking and causing uneven pressure on the pads therefore uneven wear on the pads?
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