ive searched high n low....even ebay goddamnit

 

looks like OEM Viscous from a JDM trans...B16 or GSR, but using allen head fasteners instead of hex head

Edit-not 100% the same though :scratch:

 

took some pics of a gutted JDM GSR diff I have sitting around

 

hmm that looks an awful lot like it but i dunno.....its blowing my mind

 

That would be a factory differential my friend. Nobody makes an aftermarket differential with that bolt pattern. It is unique to OEM Honda JDM transmissions equipped with an LSD. There may be slight differences in appearance that vary among generations but, that is about it. Might want to check the clearance on that diff when reinstalling it...Someone did a bad job Or you may want to try and stake the bearing because i looks like it may have been spinning on the bearing spigot as well.