Hey guys,
Not so much a comment on the TPIS. I use the SLP triple threat (3 K&Ns). They don't require you to cut the shroud. But I did anyway and what a difference in air flow. Now to be safe because of the issue with hitting a big puddle I made a slight adaptation. I cut the hole in an oblong shape. I then took an eaves vent (ya know for your house). The vent is about 6"x9". The vent has metal screen on the underside to stop major debris getting in the engine compartment. But the vent is slatted and I have the slats facing forward. The air filters can suck all the air they want. Rain, even a big puddle, will barely get through. I took some thin rubber weatherseal and laid it around the vent before I screwed it down so it makes a nice seal. I drive mine to work every day, rain or shine. The corner compartments get soaked because of the headlights. The middle area around the radiator doesn't hardly get wet at all. Never seen water on the top side of the eaves vent where the filters are sucking air. Works like a charm. Total cost $2.00.
Graham