The brakes are more precise and they fit the 18" arc-8 wheels.
If you are a track racer and like to do several laps without stoping for cooling, the bbk kit is what you need.
I´m using the Hawk DTC-70 and PFC01, both very good pads.
I recommend you install with any pad a heat shield.
The StopTech pads have this heat shield and it is removable... use it with the performance pads.