Scoop is fiberglass mounted directly to intercooler, then you cut a hole in your hood to shut the hood with the scoop sticking out. It is totally redneck, and I wouldn't do it again, but it was fun to annoy the neighbors and worked great
No problem with rain, just made the intercooler more intercoolery. For a while I just had a hole in the hood and had the truck parked through multiple rain/snow events--didn't get anything important wet.
p.s. car in background is buddy's homemade race car--not an atom, but looks pretty similar.