Where would I find a tune for my 2011 G37S i hear that a tune can increase horsepower and overall perform

 

Probably meant "ECU" when you wrote "EXU", but you actually made me google it anyway. Dammit. Go read up in the "ECU tuning" sub-forum. This is the newbie forum... wrong place.

https://www.myg37.com/forums/ecu-tuning-dyno-data-409/

This thread's not worth moving.

And apparently this is the third time you did this, champ. Quit it.

/closed