[Trawz]

I have had an odd problem pop up on my last track day.

After about 3-5 hot laps, the car starts to shake under braking. The harder I push the car into the braking zone, the worse the vibration gets.

I know its coming from the rear brakes. Nothing comes through to the steering wheel. The rear pads were recently changed from ECS Yellows to HAWK HP Sport pads just a week prior to the track day.

Yes, defiantly feels like warped rotors, but they were fine just a couple weeks prior to the pad change.
Plus, in the time the car cools down between heats, it goes away until I put 3-5 laps on it on the next heat.

Anyone experience this? Don't want to waste too much time figuring this out before the next event.

Thank you!