If you go back a few posts you'll see that I gave a description of how to do this:
"It's hard to explain how you should fit this, but the OEM plastic rim in your photo has to fit in exactly the same way with the honeycomb screen as does the OEM MAF screen. So you need to cut a rebate around the edge of the honeycomb screen. To do this, I stuck a few pieces of masking tape onto one face of the honeycomb and then traced around the plastic rim. I then used a Dremel with a diamond cutting disc to cut the circle marked on the masking tape to fit within the plastic rim, BUT I ONLY CUT about 5mm into the honeycomb I then cut from the side of the honeycomb just enough to remove the honeycomb to produce the rebate. Does this make sense?"
I also suggested that you can cut the honeycomb with a pair of nail scissors.
