for the K&N are you talking about K&N 69-8433TTK? Only curious because that's what I was going to throw on ours and its the only intake I can find K&N makes for the redline.
Also any idea if they make a pre-filter for that giant filter? Haven't been able to find one either and have though about emailing K&N.
It's an oiled filter so there is no wrap like the GMPP intake. Although that filter size is common so you could probably find a wrap on a place like summit. Just need that size specific wrap and not kappa specific. The intake tube is car spefic, while the filter head is common. Even kappa sphere makes a replacement head size for it.