If you have vent lines connected to a axle, transmission or transfer case, and you don't like the unfinished look of cut hose, you can simply add a rubber or vinyl cap, cut a hole in it, and slip it over the end of the hose. This will give your vent lines that cool racecar look.
To eliminate any possibility of dirt, dust or grime getting inside the vent line, cut a little foam and insert it into the hose.