I am picking up a high powered Z on Monday that is equiped with the RPS carbon carbon unit. It felt very similar to the clutch in my last Z, which was something that would hold around a stage three's power(forgot the clutch). driving the carbon carbon unit felt fine on the street, i had no issues with stalling or drivability. thats after not having driven stick since the begining of the year. i would recomend it based on what i have seen greg post about it as well as others on this topic. plus, it is fully rebuildable