The Clutch Masters FX850 is for 08-10 Evolution Xs making between 600 & 1200hp. The FX850 is a serious track clutch system and is not suggested for a car that will see any street time. The FX850 is very similar to the FX700, but uses a larger surface area and different friction materials. The kit comes in two disc options: A Kevlar/ceramic combo for smoother engagement, or for a more bite (with a side of harshness) the ceramic/ceramic discs. Either clutch pack in the FX850 will have a harsh, immediate on-off engagement. The FX850 is recommended for race use only.