I recently purchased both sets, front & rear, Chromebrakes drilled and slotted Rotors, along with 2 sets of the Chromebrakes Ceramic Brake Pads. The difference in the stopping distance is a world of difference. Minimal dust from the pads, incredible right out of the box, and silent. The rotors themselves, are constructed from a high-quality gray iron, and are a VAST improvement from stock. Slotting throughout the rotors ensures even pad wear and long-lasting performance. A worthy purchase.