I spent a little more on pads and rotors which I thought were good quality (K3057). Unfortunately, after about 6 months and 2000 km, I got the typical brake pulsing. I installed the pads/discs myself. They were installed correctly. I can do a better job than most professional mechanics. The 60-day warranty has expired and the 36-month warranty specifically excludes Disc Thickness Variation (DTV) issues. The slotted design of these rotors should minimize this problem. β¦.very disappointed.