Originally Posted by track_warrior
Happened to me this weekend im on stock pads, fluid, and rotors for now. The shutter and vibration went away after driving it for a couple of days normally.
I had the exact issue after my first HPDE. Sounds like it was from pad transfer that eventually wore away. Get yourself a good set of track pads and continue driving them for a day after event to clean rotors. Then switch back to OEM pads. This will solve the problem. I like the PFC-06's because they last a long time and have almost the same amount of bite as the 01's.