OK, I contacted the company and they DO NOT sell a kit for the f10 yet. I watched some of their videos and by the time I bought all the tools needed to do this job, as fun as it would be, it wouldn't be as cost effective as the initial #'s show. SO... someone suggested a m5 diff and on ebay 30k miles they go for 5-600. Not bad right? However look at this:
http://m5carblog.blogspot.com/2013/02/differential.html
Looks like there is a computer that controls a motor that tights the clutch to lock up the diff. So I would imagine you'd also have to buy the module and get programming done. I didn't search the forums but I'm sure THAT is cost prohibitive as well. Can anyone confirm this?
Thoughts or comments anyone? I'd really like to do this next. Looks like it's wavetec, VAC motor sports has an interesting option, but as far as quaife a quick search didn't reveal any US vendors. Anyone have a link for that one?
https://www.ecstuning.com/b-wavetrac...30309175wkwvt/
https://store.vacmotorsports.com/vac...535-p4378.aspx