how do you install this thing??????

What brand?
They come with instructions.
Remove the air box thats about it.

Take off the rubber pipe that goes from the huge box in the front left corner behind the passenger headlight. Then take out the big box. Then slide your new intake onto the throttle body. yay. cold air.

remove old air box and put this in its place....unless its the kind that goes down into your fender well.....i don't like those because you have to almost take the bumper off to install them.....