I have one but it's not in a TR, it is in a Mustang. The car mainly used for autocross/open track stuff, it is not street driven. On the track, changing to the Torsen was huge difference in applying the power coming out of the corners. It feels like a totally different car, unfortunately the engine developed some problems and I was only able to run one event so far with the Torsen. I don't remember where I got it, I will have to find the paperwork on it.
