the only way a pod filter will pass rwc here in Vic is if the filter is secured to chassis like the Air Box is even though the piping to the pod is solid the filter still must be secured
Last time my airbox got blown apart from a backfire as its on gas because of a bad plug Supercheap told me to put a pod on until I found out the same about not being road worthy in Vic. Pretty stupid as it is attached to the throttle body. So I paid 20 for a new secondhand box.