I would suggest the Hyroshield or a bypass valve from AEM.
I suggest the bypass valve more only b/c that hydro shield will only last so long before its protective coating wears off. The bypass valve will install right where it drops down to a straight line. What it does is if you accidently submerge your filter it will keep your car from sucking in water and blowing your motor.
Here is a link to where you can get one, there are 3 available but you need to know the diameter of the intake pipe.