Yeah, I've also seen some special drain grommets on land rover air boxes which are more like a one way valve but are quite big and would get blown open by the pressure...

Hi

Beetles use a special drain grommet in the headlight bucket, maybe one of these would work?

If a dip could be built into the inlet path, that would shed water as well.

This inlet is really worth pursuing, Jak Rizzo on Aussieveedubers.com reported a boost increase when he did this, it actually initiated his ECUs over boost cut-out

Steve

The main reason I am doing all this is from Jak's (and Boof's) positive comments... It is going to be very tight for space to get any kind of dip in place between the tyre and inner wing, maybe I can do some sort of labyrinth, will have to see when I take the wing off and start building the panel filter housing..

Love the wheel, looking forward when it completed