the stock intake box is set up pretty well to prevent hydrolocking.... as long as you leave that flap on the front which would deflect that wave of water away from the inlet. I'm not a huge fan of big conical filters for these types of rigs.... they really don't help much in terms of performance (unless the engine is running above 5000 rpms constantly. ... which we don't do with our kind of offroading) and they're more likely to ingest water.