I have Injen intakes as well. I really don't think you should have any issues as long as you don't submerged your front end into a big puddle. And when it rains, just don't rev your engine into high rpms so the intakes won't suck in too much air or possibly water. The front bumper is covered pretty well underneath, so I think the filters are pretty well protected.
Have you considered getting the Injen hydroshield covers? They are basically covers that go over the air filters and they are water repellent. They don't affect air flow, but it does give you a piece of mind because it keeps the air filters dry when it rains. I had an Injen CAI with the hydroshield cover in my Altima SER for 5 years, and I never hydro-locked my engine.
Now that I have my 370z with the Injen CAI, I'm going to get the hydroshields covers as well. If you don't like the idea of the hydroshield covers, I would go with the first option you mentioned with the intake water bypass vavle.
|