You could do that, but for a good bang for your buck mod considering you plan on taking yours to the track (would only cost a couple to a few hundred more than getting DBA4000's for the fronts), you can follow Steve's findings: Brake Options - Standard Aurion +45mm Someone else will have to chime in on that one. I reckon SuperDave might know. From what I've heard, you can't exactly have track approved and road legal at the same time, therefore meaning if you have it road legal, in the end you will only be able to enter road legal categories. I'm not sure, I'm just saying what I think I heard.