I think that you mistake this site for the minivan site to which you used to post such nonsense. Unknown to you there are a lot of older, educated people who buy STs- including engineers. So let me begin- First of all, have YOU measured the volume difference between the upgrade brake and the originals? No you haven't. Second, I don't know where you took any physics classes but you missed the section on Boyle- a few extra milliliters of capacity, even if it existed, would have nothing to do with the pressure applied to the braking system. Next, the extra heat generated is dissipated due to the larger surface area of the rotor, not to mention the cross drilling and venting added to the rotors. You must have also missed that day in class. As far as higher amounts of fluid movement? The only reason this would happen is under a condition where the brake pads were much further away from the rotor- so you've also measured that as well? The only thing you said that makes any sense is that pads and fluid are a crucial part of a braking system. I just don't understand people who show off their ignorance- what is the motivation behind that?