you'll need:
intake filter(buy one)
stock intake system
hacksaw!

i thought of this because the hose from my block had no where to go after i attached the filter right onto the intake manifold. I removed my intake system, except manifold and ram air (part in the wheel well) then i took the tube that goes from the airbox to the manifold and cut it with a hacksaw making sure my filter would fit under the hood in a spot it wouldnt stick up. then i attached my filter to the tube and that to my manifold, its just as good as going out and buying some, doesnt look as nice, but 1/3 of the cost... it gave ma bit more pull and my engine sounds nicer.