http://page.auctions.yahoo.co.jp/jp/auction/36259192

 

interesting, but you have to cut the air box, and I don't think the soft portion of the filter inlet would be completely air tight.

i like how it says:

 

I wonder what K&N model it is. Here is the Alta Vista translation:

To you recommend the method which shaves the medium divider board of the air chestnut BOX of the S2000. The genuine air filter - with the filter of the famous K & N, of course it is brand-new not yet opening with the high performance which can be exchanged that way. It is settled exactly in the genuine filter box. It is something which installed the graph with non processing which has been exhibited separately and measured in possible small type. Being to be something which was measured in the United States the unit is different from Japan, but about the 3hp power that it raises, you think it understands over all the rotary limits. This filter being large, it meaning that resistance is little, it is thought efficiency is better than this. You install the one where we would not like to process the air chestnut BOX, with non processing which has been exhibited separately please look at the possible filter. The postage XXYEN consumer tax is added to 1,000 and sum total.

 

gawd damn i just love them translations

 

And why would you need a filter that big? Does it reallly make a difference?! Sheesh!

 

I thought you could just get rid of the bottom.