For you guys that are looking into ST, a lot of the old S4 owners who tracked a lot with ST brakes had issues with the rotor hats with heavy track use. I think it was either cracking or corroding. ST was telling them that it's normal wear and tear. After that, a lot of guys switched to Alcons and Brembos. Just something to think about.
09 E90 M3 - Interlagos Blue / Black Novillo / Sycamore Anthracite / Eibach / HRE