I have a g35 with a factory pop up navigation system. I would like to change the radio but continue to use the original navi. Is this the correct adaptor to use? And will the audio continue to work on my navigation system?

Metra 99-7604 Factory Integration Adapter
http://www.crutchfield.com/p_1209976...ter-Black.html

I found this on Crutchfield. Any help would be greatly appreciated.