Who knows if you'd get Nav out of the deal? I wouldn't bet any of my money on it.
Amp is http://hondapartsnetwork.com/part/9704034/Honda-Part-39186-TBA-A01-Audio-Amplifier-Assembly-Premium. It's located in the r-side foot well kick panel. There are surely harness differences that would complicate this.
The EX-L (Nav) head unit is one digit different part number from the EX-L (no Nav).
Amp is http://hondapartsnetwork.com/part/9704034/Honda-Part-39186-TBA-A01-Audio-Amplifier-Assembly-Premium. It's located in the r-side foot well kick panel. There are surely harness differences that would complicate this.
The EX-L (Nav) head unit is one digit different part number from the EX-L (no Nav).