I contacted them about their product. They have what they call a stage 5 clutch with no springs in the hub. They advertise it for those who need "slipper capabilities. They also told me about a new all billet setup with dual disks, but it was only 2000 pound. After talking to some members, it sounds like I need something more like the SBC 3850. The salesman also told me their were diesel guys dragging and pulling with the stage 5 single, but I haven't found anyone yet. I think I'll invest in some piece of mind, spend the extra $1000+ and get the 3850