I have a heat extractor hood on my '02, and has not been an issue. The openings are located over some wireing connections, but they seem to be shielded from water. I have driven in heavy rain many, many times and not had an issue.
***HERE***is apic. I have since added hood pins as the hood is quite flexable and think the hood pins are sexy [sm=kiss.gif]
Jazzer
PS. I LOVE the 315's on your car, Mineral

Will get them myself later this year when my 295's are dead.