Do you know where the stamps are? I panicked because my buddy saw my rotors and said that they were backwards. Since I have gone back to the web site and it appears that I have installed them properly.dss90c said:I would turn them around. They need to be in the correct orientation for the slots to be fully effective. The EBC rotors are stamped with either a "L" or "R" to indicate which side they should be on.