If I buy a third set of new rotors, I am going to make sure they have directional curved cooling vanes and that there is a left and right side. I would have have in Brembo but since there is a left and right rotor, there should be two different part numbers. To me Disc Italia are just slickly marketed Chinese Ebay rotors that cost an extra $100 dollars. The Ebay rotors actually had a better coating on them and the disc Italia rusted right up. The OEM rotors are not a bad price and probably the best quality. Too bad the SRT/SLK32 rotors don't come drilled like most of the other AMG models do.