Originally Posted by Sticman
Now that you're saying that I do have the PZEV model. I didn't even think about that. Thats probably why it has two and others seem to only have the single filter. I will check next time I am at the dealership.
My car is PZEV and I have that also. I installed a Perrin foam filter and left that in place.
Since it is white it should indicate if the Perrin is filtering! When you go to the dealer see if you can get the part number and price because I may change it occasionally.
I just looked and that second panel is not in my eBay Subaru Service Manual (PDF).