If in doubt just whack a maxi on it. I put them on all my "important" saws ie 088, 084s, 660s, 661, 461,and the similar one for the 462. Problem solved
I have been running an outerwears on my stock filter with pretty good success. I did make a rubber washer to go between the filter and the cover to add a little pressure to the seal. So far, the fines are staying out. I am sure that the max flow would be even better still. Here are a couple of pictures of my setup. This is after 2 tanks of fuel cutting dead Doug fir in winter.