I run a marine flexible wet exhaust hose on my vehicle as an air intake hose, connected to a $20 washable filter element from Advance Autoparts.

Hold the slam right there, my vehicle did not even have an air cleaner when I got it.

YES, it is a hot air intake. This is obvious, but rather than go back to stock (beside being ugly, the mount for it is completely missing) I'm going to just build an enclosure around it. Given the size of my filter element, I could probably use a coffee can and port the other side to the original cold air ram.

DieselKid (monstercraftsman1) is a regular user on this forum, and while he does make some inventive stuff (metal center console replacements, valve wrenches, etc.) -- this kit is just off the beat and uninformed.

It's a Home Depot/Autoparts store $20 kit up to the oil seperator. Contrary to what most people say I personally do NOT like using a crankcase draft tube. Made my undercarriage disgusting in a matter of days.

I would pay, maybe, $25-30 for the oil sep. alone. But the rest? Meh.

--edit--

Something else to consider, being that my hose is flexible I can tell when the filter is clogged or otherwise not getting enough air flow, the hose contracts on load. I have to wash my filter once every two weeks. Not a bad thing in my opinion, just shows that it is working.

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Vehicles:
2002 SLK 230
Gone but not forgotten:
1983 300D
1981 El Camino 'OILBRNR' - 6.2L diesel
OM617 powered '86 F150
1984 BMW 524td
2001 VW Beetle TDI
1994 Sunurban 4x4 6.5L diesel