i have a jdm b16 ef airbox and looking for a new filter, but the stock si filter and DA filter dont fit. just anyone know of a replacemet or a similar size that you can trim down to work?

 

I got one from K&N. I can get the part number later after i look thru my receipts. They make one specifically for the jdm ef8/9 air boxes.

Actually a quick search would have turned up your answer. I knew this question looked familiar!

https://honda-tech.com/zerothread?id=1318095