PRO-KIT 5000+ Drilled and Slotted Rear Brake Kit (7512-76063) by Dynamic Friction Company®. DFC is excited and proud to introduce our newest short line of premium corrosion-resistant brake rotors - DFC GeoSpec® Coated Brake Rotors. Specially coated with a patented paint to form a durable and attractive silver-gray finish that fights rust far better than other conventional paint or zinc coatings.