I got the go ahead to get a lsd installed. I don't race or anything, just spirited driving on some local twisties for fun. But I get real tired of the one tire spinning when I want to get on it out of the corner. I typically am more of a value guy, so I want the best performance for the value with the least worry about maintenance. I assume install costs will be similar for all of them. So, is the quaife or kaaz worth the premium over the mfactory?