Watch the "top hat" area on the Brembo rotors (the part that contacts the face of the wheel). I got a set for my 325 coupe and they started to develop a thin film of rust after a few months. I took em off, wire brushed them, masked them off, then painted them silver with a high temp paint. No problems after that. But I'm sticking to OEM from now on. I saw no performance benefit and they started to squeak a little, even with OEM pads.

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"Si vis pacem, para bellum"
If you wish for peace, prepare for war

2001 325Ci (sold)
2003 Porsche 911 cab
2005 X5 4.4i
2006 English Bulldog