I used K&N filters in my S2000s and found they were worth having for the slight deepening of the induction noise, and the fact that they didn't need replacing with every annual service.

I'm not really interested in going for airbox replacement in the NSX, but wondered if the K&N filter 33-2713 (http://www.roadrunnermotorsport.co.u...ir-filters.asp) would make much difference? Anyone using one and would you recommend it?

cheers, Ewan