I have a 2011 g37x sedan 7-speed auto awd, I am thinking of installing a supercharger kit. Anyone know what the best supercharger kit would be, right now I am debating between the soho supercharger kit or the stillen kit. My G is bone stock, what other upgrades would I need to get in order to support the supercharger?

 

I have no experience with this, but what I heard is the 7AT on the G37 is somewhat of a weak leak on it. I think some upgrade the valve body / internals or do the VR30 swap.

 

Z1 is about to throw their kit in the mix! So you might wanna check them out.
Supprting mods will vary according to your power goals.
Make sure you have enough fuel! I went with a full fuel system. Pump, return, rails and injectors. CJM makes some nice fuel stuff.
If my ECM could run ecuteck, I'd have done a flex fuel sensor too.
Definitely upgrade the valve body and get an LSD if you don't already have one.
and don't forget to check your oil pressure! galley/gallery gaskets may need attention.