Help me diagnose. I have high speed braking vibration. Only occurs at 45+ speeds and vibrations can be felt in steering wheel and brake pedal. When I brake at slower than 45 I do not get any vibration

Sounds like warped rotors to me. I would have them resurfaced or get a new pair. Do you notice any noise from any specific wheel when stopping?

+1

Bump, rotors are new and seem even. Bedded brakes twice

Did you check all the caliper bolts and make sure the rotor is sitting flat? Really sounds like warped rotors. Could dial indicate the rotors while on the car if it comes to that.

rotors, and check your brake pads if you have the stock ones

Key word here - seem. Its pad material transfer.

You can try to take 120 grit sand paper to the rotor surfaces and then re-bed the pads. But if that does not work, you will have to get them turned.

So deposits of the pad on the rotor? I will try sand paper. Also the rotor is free moving right? Just held on by the lug nuts and pad? I noticed that I can pull on the rotor to get it to wobble

^^^ what he said

It stops wobbling when you torque the wheel and lugs on.

warped rotors , i heard this usually happens after going on wet surface when rotors are hot

No. "Warped" is the feeling you are getting in the wheel/brake pedal. They are not warped at the rotor surface level. It is pad transfer.

Doesn't matter how many times you bedd them. It's matter that if you did it right or not.

Vibration, did you notice it right after replaced the brakes?

Same thing happened to me today, I put new rotors and pads in, bed them in properly and over the last week it has been shuddering under heavy braking, I did a track day to day and it got worse as they got hot???

It is most likely uneven pad transfer. Sometimes the new rotors have a coating on them that is a little hard to remove before installing them. Did you use Brake Cleen on them to remove it before installing?

Try sanding the rotors with 180 grit wet dry paper until the rotors are nice and shiny on both surfaces. Sand the pads on a flat hard surface with the same grit paper to renew the surface on them. Then wash everything with Brake Cleen before installing.

Then re- bed the pads.

L8r