the answer is quite simple.
Stock air box = air intake collaspe at 250 rwkw for sure.
Clamps around the pipe? not sure how thats gonna stop it from sucking in?
There are some aftermarket intakes for pods only but I looked at their design and wan't happy with the use of the quality. Mine has been made, just havnt fitted it - will when I take it to get some stuff done soon. I have designed it to fit with the stock air box so i can run either a pod or the airbox.
Based on my testing, the air box is restrictive at these power levels. For any1 who thinks otherwise why does it suck closed int he first place? You either cut some holes in the top of the stock box or do like the GTR version and run an extra intake from say the wheel arc.
If you use a pod, you wont have the issue peroid.