Did this after I shimmed my carb needles while I still had all my body work off. Can't really notice any difference yet as I haven't taken it out for a ride.
It was very difficult for me to push the snorkel out so I had get a screwdriver to pry it a little before I got it out (made sure to cover parts with towels and such so nothing was scratched, no worries
!)
Managed to finally get it out, but I can't say it's worth it quite yet, as I have yet to see what effect it has on my bike.