airbox, cai... DIY!?

Hello people, i recently bought a crash and rust free (except door and rear arches) eg hatch, it was a 1.3 and now there is a b16 inside.
I didnt get the original air box and got a BMC CAI at the moment.
So my question is which type is best for most hp gain? Air box, short ram or CAI?
And can someone provide examples with exact measurements? I work with carbon so i thought about doing an carbon air box, would look damn good under the hood
I didnt get the original air box and got a BMC CAI at the moment.
So my question is which type is best for most hp gain? Air box, short ram or CAI?
And can someone provide examples with exact measurements? I work with carbon so i thought about doing an carbon air box, would look damn good under the hood
