It's an aftermarket throw out bearing too, that's been adapted for use with a T56. It's the same throw out as what they sell for the 833's. The price is outrageous, but the bigger concern for me is that you're not using a throw out bearing designed for use with that transmission. The Viper throw out bearings work, and were designed for that transmission. This application will take a spacer with a Viper throwout, but that's not a big deal. So for me I'd rather use a Viper throw out anyway, the question then is whether or not to just use a reproduction one (I bought one from Dorman), or to find an aftermarket one specific for a Viper T56.