Originally Posted by Mr. Max
Ditto to what everyone has said. I have a a single tube, Needswings style cold air setup which has the filter in front of the radiator. If I had to do it again I'd go for the SL55 setup and here is why. I live in So. California so it doesn't rain much but it can really pour when it does. I worry about all that rain getting sucked into the engine and ending up with hydro lock. I wouldn't worry about the SL55 setup. It costs a whole lot more than $168.00 and takes a little work to adapt it but it flows well and it flows cold and the big air boxes look pretty nice.
The only way you would hydrolock the engine is driving through standing water, a couple drops of water aren't going to hurt. If I'm not mistaken, you would need close to or equal to the volume of the combustion chamber at TDC. K&N filters dont let in as much water as you would think.. Its actually tough to get it through (test it out next time you clean the filter). I would imagine the sl55 setup would be prone to the same risk of hydrolock as the needswings.