I just ordered a SRI, and now I have an extra K&N Air Filter for my 2006 civic si. if someone would like the drop-in filter, I'd sell it for 10 bucks plus the shipping, which can't be much. The filter has been in my car for the last 3,000 miles, so it is still essentially brand new. this filter would be 45 at autozone. if someone wants it let me know.