[wolds]

So I replaced my water pump and thermostat over the weekend and had a chance to pop the airbox open to check the condition of the filter. I noticed that in the bottom section there is a grill structure and what is left of a foam filter. Kinda looked like the type of foam you might find in a window air-conditioner. So I checked the online parts catalogue for a replacement but it isn't shown in the exploded view or PN list. Anyone run into this before and have a fix?