To start off...
1. You don't need a stupid cone filter
2. the gains seen from simply removing the air box is negligible.
3. You don't need to actually spend money on an intake.
Now that we have that covered, I'm going to shed some light on this typical upgrade.
- The stock air box reduces the intake harmonics by simply canceling out those air "pulses." It is VERY easy to mod the stock box so it is incapable of canceling out those harmonics.
- The stock air filter's surface area is more than enough to feed the engine, without being a major restriction. The surface area gained by a typical cone filter is marginal.
Now where is all of this going?....
Yes thats right, it's a typical hole saw. While some of these can get very expensive depending on the brand, you can find them for as little as $5. I reccomend getting a 2.5", but a 3" should also work.
Now all you have to do is drill 2 holes on the passenger side of the airbox (faces the engine compartment). Clean it out, and replace the filter. DONE.
Now you have yourself an intake that will flow just as much as a cone filter, with a nice deep sound, and with the looks of stock. How bout that? And all for about $15 bucks (depending on what filter)
I'll get some pics of mine here soon, but it shouldn't be that
hard to picture what i'm talking about.