Hi, i just got a 2009 Focus 1.8 Zetec S and im looking to upgrade the brakes to something better. Currently i have the standard front discs and pads and drums on the rear (Why drums i have no idea). I was thinking of maybe switching them out for the ST calipers etc but wanted to know if anyone had any experience with this, if so how well it went and how much roughly it cost. Thanks in advance, Chris.