i'm not sure about EG civic, but i think its the same as the EK civic.

you need to remove the whole gearstick and then replace it with teh new one.

there are a couple of screws that are a real pain to put in. I can't give you the finer details cos I got someone to do it. But if you are willing to give it a shot yourself, it should take about 1 hour, and the exhaust shouldn't need to be touched in the process