When I got my SiR, the element was a piece of chickenwire
I bought a standard Honda filter which was ok, but swapped to a Jamex reusable filter. Put them both on a flow bench at finer filter (aussie filter company) and the Jamex flowed 7% better than the stock filter (both using the stock cold air box). A finer filter version flowed 6% better than stock, but was custom made. Interestingly, I tried a pod that had been built for a VTiR (EK B16A hatch over here) and lost power over the standard box (heat under the bonnet was the reason).
Get a K&N reusable or any other good brand reusable is my thought
