Presume your talking about a Cold Air Intake??
best off getting a decent drop in panel filter.... K&N, Apexi, Cosworth etc...
most them are supplied by traders on the site.
A CAI is a bad idea in this country man! Plenty of times I've thought about getting one but I just couldnt run the risk of hydrolock!
Better off getting a drop in and if you wanna keep the temp down, get a good aftermarket IM gasket!
I love the noise of the induction kit. And i also have a cold air feed from the front bumper to the induction kit. You won't run the risk of hydrolock IMO unless you decide to drive through a flood or something because any moisture that gets in will be water vapour and that will just serve to reduce the intake temp same as water injection does