Have a look at this explanation of the R56 S upgrade that I posted over 2 years ago. I have it fitted. Love it. Have done 2 x track days, no fade. Mine's a road use car i track occaissionaly. The mod-a-Mini is the one evryone on the R53 Owners Club goes for. It is a decent price.
www.mini2.com

R53 Front Brakes Upgrade ? ?Big Brake? Options
R53 Front Brakes Upgrade – ‘Big Brake’ Options Don’t know if anyone is interested on here, but I have set about this on my 2005 R53, so here it is. Long one I’m afraid. Introduction This is an attempt to help those who want to upgrade their Gen 1 front brakes to the more effective Gen 2 front...