I've searched around but haven't really found an answer to this. After cleaning my wheels with p21s, for the first 15-30 seconds after first applying my brakes after cleaning the wheels, there is a violent shudder/vibration throughout the whole car. I've read that the OEM rotors are crap but this never happens outside of the first few seconds after cleaning the wheels. Any help is appreciated thanks.

 

happens to me too but it goes back to normal once the brakes heat up.

 

maybe some weights fell off? or the bolts were not torqued down properly. when do you feel the vibration?

 

It only happens for the first couple of times I apply my brakes after the wheels have been washed, other than that, there are no problems.