Originally Posted by Homemade WRX
I understand that and hence I was simply showing another option that offers a two-fold upgrade....though more costly. A clutch pack rear > torsen
Stock R160 is not Torsen, but viscous. Least desirable option.
As far as Torsen being better than clutch type - negative. Depends on the application. For road course in many cases - yup (and obviously for rallying). For autox and general street application - Torsen is a better choice. I guess it also depends on the driver's preference.
Also the stock 04-06 STI clutch diff (made by Hitachi) is crap. 2-way, very weak and with poor ramp up.