wilwood brakes (big brake System)

[bloibl]

I have a new set of wilwood big brake 12.19 rotor.

I just finished installing the brakes. Under normal driving conditions they are working great with no noise. When I get on the brakes hard I am getting a thumping noise. Checked the brakes out and everything is tight. Ball joints/caliper are tight and set with correct torque requirments.

What in the world could be wrong? Please any help will be great help.


Thanks