I had the Proline discs installed about 4000 miles ago and they are already warped in the front. There is a pronounced pulsing/shimmy. Braking in a turn is even more fun as the wheel needs to held onto with vigor. The miles are mostly highway, no excessive brake usage.
Has anyone else experienced this?
Anyone know if there is any sort of warranty/guarantee?
I have emailed the installer twice and haven't heard anything back.

Thanks!