I have the RB stock rear kit with oversized rotors and the 4 piston caliper up front. They work great, the braking is as good or better than the Boxster S I have and it has incredible braking. My only suggestion would be to go with Hawk DTC60 up front instead of HP+. I removed the dust shields and added some air deflectors but with the HP+ in front i kept getting uneven pad deposition (caused by temps beyond what the HP+ are designed for) which was causing wobble no matter how well I cleaned it off and re-bedded the pads. Now with the DTC60 up front and the HP+ in the rear, it is awesome. I have had no issues with the different pads f+r. And you can order direct from them, too without having to risk some of our more unreliable vendors over here in the USA.