Nathan Richardson wrote on Thursday, November 04, 2010 - 07:26 pm:Yes the Supra pistons are slightly smaller but there is twice as many of them. If you were consider the diameter of all the pistons added together as in one of the formulas from your link, the effective piston diameter of the Supra brakes would be almost 93% larger than the 2 pots and therefore must have more clamping force.