EBC Front Turbo Groove Disc & Yellowstuff Pad for Opel Astra J 1.6 115HP 2009>15. Check Out Our Feedback. This listing is for an EBC Front Brake Kit – Turbo Groove Discs & Yellowstuff Pads The dimple drilled rotor was invented by EBC back in the 90’s and has been imitated by many because of […]