Ended up blowing out my factory s4 transmission diff spider gears. Ordered an lsd off a guy and went to mount up my ring gear and the lsd doesnt have reverse threads like my factory diff. Am I missing something did honds have standard thread differentials or is this diff not for a Honda? Ring gear lines up perfect.

 

That is a clutch type LSD and the ring gear mounts differently than the OE configuration... and thus, comes NEW with conventional bolts. Apparently, your "good deal" used LSD didn't come with those, so you will need to contact KAAZ, Cusco, or a transmission specialist like SynchroTech or the member Aquafina here on H/T and maybe they have what you need in stock.