i had the boxster s rears on my there were absolutely shyte pistons dont match the master cylinder there too small and too much fade
the LCR and the boxster S Fronts are the same pistons and are more suited to the mk4 master cylinder, you get a oem pedal feel and no fade unlike the boxster s rears.
am running a 365mm disc with the LCR brakes ferroodo pads and the stopping power is basically a toe curl.