this is the answer for many people who want to keep their factory dash. it even works with stock navi's. it's an mtx re-q. It gives you outputs for your sub amp and your speaker amps. i was just wondering if anyone's successfully installed it in their civics with stock navigations. the guy at the dealer told me once you try to take it out, it renders the system. so i was wondering if i go to install it, would it mess up my navi even if the re-qs made to work with it?