Had some EBC grooved and dotted discs fitted on the S3. After a very short period of time i.e 2 months the discs became extremley badly warped i.e shaking and vibrating under braking especially hard braking. The question I have is do I go back to standard OEM Audi Discs or is there something elses I should be going for ?. Recomendations would be much appreciated.

 

OEM's are the cheaper method, but if you want a BBK still get stoptech, or OEM Porsche brakes from ECS tuning. Both of those nobody has had problems with them the same way you did on those.