Desnorkeling a 987 was vigorously debated in this thread, in which I posted the negative experiences of a 987 owner from PPBB.
boxster exhaust too quiet?
Ironically, that owner was KTS who was so jazzed about the initial removal in the Renntech thread posted by Tool Pants. The 986 owners dismissed the negative experience as "anecdotal" and even quoted some first semester Latin.
Here's another post of a negative experience, from a regular over at PPBB who desnorkeled his 986 but found it didn't work well with
an installed PSE and Fabspeed. I'm sure it will be also dismissed as umm...another anecdote, or related to that setup.
The mod may be completely harmless, but my point is, there are folks who at least in their minds attributed negative performance to the snorkel removal.
It's your car, your snorkel...