well, i was cleaning the garage and going through massive amounts of old parts from friends and i got bored, so i thought i'd throw something together, this is the front pipe from a honda civic dx (EG).
kinda gives a ram-air effect, heh
ok, so its not really 'homemade,' but i was just messin around, but i may cut it at a better angle so the filter is moved 2-3" to the right so it completely fills the opening next to the foglight. The pipe can be had for $40 from
http://www.airdynamicracing.com with filter and hose fittings...i think its still 40 for the civic...
-Dan