Was wondering about the antenna- does anyone know about the Nav antenna? I ordered Nav, does it have a separate antenna? 2 antennas or 1?
Thanks!

 

The Nav's antenna is the same as the R56, it's in the wedge on the base of the antenna.

 

Thanks.
Do you know if swapping out the oem antenna for a shorter one has any negative impact?

 

It won't affect the navigation, since the shorter antenna attaches on top of the wedge. It may affect FM/AM reception. There are been some threads about it in the 2nd Gen forums. I don't remember if there was a clear answer.

 

thanks!