I recently purchased an Auburn Gear Pro Series #542039, I got a good deal on it but am planning on putting it in my 99% DD 1% track car. Auburn says this diff will be pretty tight for street application. Anyone running one?
I have one in my 99 cobra open track car and the race car I bought also had one in it. I haven't been upset with them to need a Torsen. I doubt I would see enough gain to warrant the expense. For your 1% track car you will be more than happy with the auburn.
Finally got it in the car, only had chance to test drive it up the street and realized i was sent the wrong brake pads for the rear of my car, i will be putting some good miles on it this weekend.