I had antmans 07 calvin with this setup and the meinhoff map and put lots of miles on it with no lack of power noticed its still running strong for the new owner. I gave the bike to my friends son with 113k plus miles
Those pictures I posted of the filter are of the CalVin.
I also did it to my 98 EV1100 and 2000 Jackal using the stock maps, 2004 750 Breva, and back in the day on my 76 850T3 and 77 Convert.
I also just did it on my newly acquired 2011 V7 Classic. On my Griso I left the stock airbox and filter.
On my 2004 V11 sport naked I removed the air box but used individual UNI pods because the spine frame was in the way.
I have always used the stock intake tubes on all these bikes.
Also I like the intake pulsating roar. It is part of the Guzzi charm of the cacophony of sounds that it makes.