rotors that there would be a ton of unused rotor area if the calipers would even clear them. I've always heard that the side the rotor went on depended on the internal cooling vanes. If the internal cooling vanes are straight up and down then it doesn't matter which side you put the rotors on. If the internal cooling vanes have a lean on them, then the internal cooling vanes need to lean towards the back of the car, no matter which direction the drilled holes and slots lean. I hope this makes sense.