Oh, and BMW's performance division/aftermarket source Dinan
already have a Carbon Fiber intake for many BMW models. They
are real CF, Not like that crap you get from ebay where it's only a
fake CF sticker over a stainless pipe. I checked it out( BMW CF
intake) and you could acutally modify your stock intake to have
that CF intake fit your lude. Amazing. it's supposed to be cold air
intake for BMW Z3 but it's got that shape we could use. just
letting you know of the options.
You could study some of the aerodynamics applied to intakes.
It's interesting. How the air travels at the speed of light, up and
down the intake pipe just before everytime the throttle body
opens up. and so on and on. the longer and narrower the pipe
without restricting the air to the engine is the best functioning
intake and is best friend to the petro and the pistons.

anyway...