What is available as far as headers for MP3 ?

[4amStudios]

Looking to get some more air into the engine . Cannot find any info on a header for the MP3

[Dreeza]

i have a racing mazda header that i bought off someone with an mp3...they loved it, they just went turbo, so they had to sell. Has under 500 miles. its 4-2-1, in awesome condition...PM me if you are interested.

[SomaMP3]

Looking to get some more air into the engine . Cannot find any info on a header for the MP3
How does putting headers on get more air into the engine.....don't they just release back pressure for more even flow?

[mp3moose]

AWR makes a good header. Not cheap though.