I put the drilled and slotted rotors on my daily driver. I warped the previous set of rotors and this was under normal driving conditions. I had an unusual vibration at speed and rotated tires first. Still had the issue so I changed the rotors next (could tell it was rotors then with wheel off). Vibration went away. The new ones offer better braking performance, especially when I need to “get on them” as there are a lot of crazies on the road in GA. I bought the better brake pads as well that need to be “broken in”. They have been on about two years and still perform as new. I got them from rock auto. I recommend them.