the air box resonater has a bolt right behind the turn signal that is difficult to get to. you can get it without removing the bumper. i removed the right headlight blinker and used a long extension and a universal fitting.
its mostly dead weight if your puttingin an intake. it has to be remover if using a CAI.

the exhaust resonater in just before the 's' bend in the exhaust. it just quiets down the exhaust. on my b16 i have two plus a straight through muffler, and the exhaust sounds deep, and at a practical sound level.