This was started at rs25 at the end of last year. Seems to have fizzled out.
As far as I can tell, Group A is no longer.
I think the cost factor is what keeps this kind of kit from taking off. I was interested in something like this for my OBS. However, for the same investment, I could trade my car in and get a WRX that is factory tuned to work smoothly and has tougher internals. Other than hiding performance from your auto insurance company, I don't think most people would pay the same or more for this than the cost of a WRX.
Don't get me wrong, as I'd love to see more go-fast stuff offered for us n/a guys, but I just don't think it is cost effective for most circumstances. Maybe I'm wrong completely. Hopefully I am.