Ya im kinda against it going alll the way to the frame rail unless you plan on shorting it up everytime when it is raining. I had a cold air intake on my accord that came out below the front tire under the fender it was low to the ground and first rain i sucked up water in it and threw a rod threw the block in two places. Not fun
there used to be some cheap filters available on ebay.....ractive brand i think, they had a cone filter inside a removable shroud. Like this, but the lip was longer, about an inch. I always thought it might be a interesting to use this as an inline filter for a ram air setup. Just attach another piece of pipe & clamp to the inlet side of the filter, and put the air catcher box/pipe/inlet where ever has the highest pressure at speed. in the radiator support behind the grille....below the bumper....in a NACA duct on the hood....I dunno, be creative!
oh yea i drive a 4x4 lol i was thinkin about getting that filter and putting some ducting in an area with lots of air flow