They are not air filers, they are a funnel shaped inlet with a screen over the front. It will suck in everything.
They are for drag racing, not street riding. Sucking water aint no fun.

 

Thank you for your posts,

I altered my velocity stack because I wanted a filter element inside it, I also wanted an all black look so I swapped as many of the fasteners for black stainless equivalents. I couldn't source any black stainless breather bolts so I used black nylon thread protectors to cover up the silver bolt heads.

I installed Nightrider XiED fuel enrichment devices to handle the fuelling, these are a plug and play item that's installed in the O2 sensors circuits.

 

I run the this one Crusher® Revolt™ Air Cleaner | Air Cleaners | Performance | Kuryakyn