[jaykay]

The intake side scoop lip was put in place to prevent water ingress as i recall. The right side does not provide air intake for combustion so it is not required.

I once had paper numbers taped on the side of my car...after a solid day of track rain they broke up....of course the drivers side number was right in front of the air intake. The aft internal scoop surface was dotted with paper mache'. Nothing on the louvers

Of course i pulled the filter...it was clean. The lip seemed to have done its job...after this little flow test.

I rather like the asymetric quirkyness.