Stereo upgrade
 

Is there anyway of by passing the Bose stereo on a 2016 nismo with out changing the head unit? I have a line out converter but I can't get a signal.

You can tap the line out converter at the amps to the factory subs .... however ther 2016 has the ANC which need to be disable or you will get terrible feed back. I don't know the steps for the 2016 370z .... but I had to do it with my 2016 maxima when installing the aftermarket amp and subs.... my 2015 nismo 370z was before the added ANC

What is the ANC?

Active noise cancellation .... it was the only change from 2015 to 2016 ... You should be able to disable it from the head unit ... google ANC/ASE on 2016 370z

http://www.the370z.com/audio-video/1...nc-2016-a.html

Any idea what wires I would tap into?

Follow the two wires from your factory subs to the amp ... those are the two you need... I can't remember which is positive or negative ... you can look on the factory speaker terminal for the signs ... either it doesn't matter .... or I got lucky when I picked mine ... but for subs running mono shouldn't matter.... but I could be wrong ... in my case I didn't have any issues and it's been running a year now