this is probably a silly question but will a navigation system and trim work fit a 4dr civic lx, if the navigation/trim work is coming from a 2dr lx?n Oh and what else is needed if I want to convert from a non-navigation system set up??

 

it will work.

 

If you purchase a nav/stereo system from a reputable vendor, they will be able to install it using a double din kit and it will fit like OEM. Good luck.