First of all, your inline-four only has one header, not multiple headers. Sorry, but it annoys me.

Second, Megan Racing makes a popular header for not much money. It's been a while since I've researched this stuff, but they used to be around $160-$180.

I have a no-name intake on my 95 LS with a K&N filter. I love the sound, but there's hardly a mileage/power increase, if any at all. I also wished I would have gone with a regular paper filter, as they seem to filter better for less money. If you don't believe me, do some research over at the bobistheoilguy forums. There's more knowledge about fluids and filters than you can imagine.

Good luck.