also getawaycar looking at the pics....even if were that the filter was soaked in any situation the suction from the engine wouldnt carry the water strate up, it would just stay in the induction filter realy so there isnt any worrys of it even getting to the TB to have any affect on the engine.
hooded, ive got the carbon BMC induction on my almera and it seems ok with throttle responce, you could try one of them? i did have the viper induction on my first k11 with the air ducht in the front grill and it was the biggest waste of £200 there was no diffrance in perfomance at all. i once read in a fast ford mag that an induction kit is totaly pontless unless used in turbo application or very highly tuned n/a and that people claiming to have "noticed any gains" to a low tuned engine was to do with the power of surgestion. also tuneing compans have r/r diffrent cars with and without a induction kit and there was a max of 1bhp gaind and some even lost power but most didnt show any change at all.
so i would say your probs best sticking with what you have or get a GA16/better filter or the likes and i dont think air ducht route is a problem or going make a differance in anyway shape or form.