You can do it. It is easy. If you need any help just post here. Also search for installs here. Several write ups have been done. Look here for help with the Volant install:
http://www.clubtitan.org/modules.php?name=Forums&file=viewtopic&t=1193
To remove exhaust system look at this. It is a Titan, but it is the same as a Armada except the tail pipe is a little different:
http://www.clubtitan.org/modules.php?name=Forums&file=viewtopic&t=1202
http://www.clubtitan.org/modules.php?name=Forums&file=viewtopic&t=1193
To remove exhaust system look at this. It is a Titan, but it is the same as a Armada except the tail pipe is a little different:
http://www.clubtitan.org/modules.php?name=Forums&file=viewtopic&t=1202