I've been running mine from the lower bumper vent for over a year (one of my feeds anyway) and there is next to no chance of you hydrolocking your car. The vent isnt on the floor anyway, it's at a sufficient height and as previously said, if you are stupid enough to go through a puddle that is big enough, ie a foot deep, at any kind of speed, you deserve to screw your car up. It just wont happen.
Picture as well, that you need to suck up water with enough force to go all the way up the pipe (with an ID of roughly 70mm), into the airbox and then up through the filter and then into the Inlet air pipe and into the Manifold. The surface area is too large to create a suction strong enough to suck up enough water to do any damage, let alone it getting through filter etc.
You would suck up less than what alot of people do when they steam clean their engines using the 'water trick' (do a search on here or clubgti) and neither I nor anyone else have had any adverse effects from that either.
Your foglight mod does however look pretty good.. much better than the horrible tube I've seen sticking out on some peoples motors, nicely done
