I put them on my 2005 f350 6.0 after warping my old rotors with a new set of Hawk LTS pads. I've done the lapping procedure on a new, new set of Hawk pads with these new rotors and haven't had any problems so far, but have only ridden it about 800 miles and haven't dragged yet. They look great on the truck and hopefully the coated non-wear areas won't turn into ugly rust too quickly. I'm taking off a star because they need to work on their packaging. The rotors arrived worn and with a few small dents on the wear surface and elsewhere. I got regular cheap rotors shipped with no damage so at the price of EBC I need to figure out how to prevent this. Scuffs don't bother me, but while the dents I had were minor, it wouldn't be long before the performance of these expensive rotors was affected.