This is a 1.5 way mechanical LSD diff centre.
Not sure of what the brand is, i took a photo of some of the prints on the centre, if anyone does know can they please tell me.
I took it out of my R33 gtst as im selling the car and figured it would be worth more.
Centre seems to be in good condition, was a tiny bit noisy, had a slight wine at about 80-90kmh
This diff locks both wheels on and off acceleration, its pretty tight.
It has seen one track day at calder park that is it, apart from the odd slide on the streets.
any questions welcome
will post at byers expense