questions bout my 5sfe, needs to be enlighten Options

[shin]

hey guys if you look at the pic i've posted below, the 2 spot's i've circled, there's a hose connecting it. i believe that's the breather hose, am i right? so i'm wondering, if i remove the hose and replace the 2 outlets with breather filters, will it work? what will happen after replacing it? will i get like more air into the engine? maybe slight gain of hp? please help.