Rynn-I tried to copy and paste the install instructions, but my server wouldn't let me. Anyway, it says:
98+ models-diconnect the breather hose from the engine. Connect the breather filter to the engine.
98 and pre-98- models-don't disconnect the hose from the engine. Disconnect the end that goes into the air filter box and plug it into the little nipple thingy on the new intake tube.
As I said, I couldn't copy and paste, but this is more-or-less what it says.