After throwing a CF hood on the car and then washing it... there are two areas under the hood that make me nervous for no good reason. I know the engine bay can handle the water that will come at it but... the MAF sensor wires are just below the opening and the oil filter mount collected a good amount of water before I grabbed the compressor to gently blow it out. SO
Solution No 1 for giant holes in hood:
O-Ring, 70A Durometer, Round, Black, 3" ID, 3-1/2" OD, 1/4" Width
This should keep the water out.
Apparently perrin had a solution for this but no longer makes it. I sent them an email and they said they were looking to bring them back in new colors so hopefully this giant o ring is a stop gap until they make some billety goodness.