G-ELL wrote:
There's other factors that play into it.
For one, by eliminating the stock air box, you are now creating a "hot air box" meaning all the hot air under your hood gets sucked into the motor instead of what comes up from behind the headlight.
2 square feet of sheet metal, and basic hand tools can fix this.
Also Cbatters did not duct tape his filter to show performance losses/gains. just fuel economy. I have yet to meet a steath/3000gt owner that did mods JUST to improve fuel economy. in fact, most go the opposite way.
If an intact is your only mod, you will probably not feel a difference. Save your money, gut the cats, and look for other mods that will give more performance for dollar.
but to answer your orginal question
The K&N intake set for the 3000gt is pretty much the same as the one for the eclipse, only it's got a smaller filter that fits better, and costs 100 bucks more. You also get a carb sticker, which is important for some of us.
The Ebay filters will fit, but typically also come with a CRAPTASTIC y-pipe that should be thrown out. the filters are usually not as good of quality, but will filter air to some degree, and may or may not fit any better than the cheaper k&n for the eclipses.
if your looking to go cheap, just get the k&n for the eclipse with the same mas as us.