Not a problem.
Catch can I am not 100% sure on so I will not comment, I'l leave that to someone who knows what they are talking about entirely..
As far as the dose goes, the rubber pipe with no AFM will give you that same sort of filter flutter! You will defiantly need to go to a steel intake pipe, so the compressor surge echo's, giving you a nice dose.
The shorter the pipe, the more pitched the dose will be, the longer the pipe, the longer the duration of dose, but the less pitch.
Thanks,
Abu