Sam (Spamor) had a Max Power one fitted (in his 1.0 IE) straight onto the throttle body. He had to cut away some of the rubber from it’s base to get it to fit, and he said he had to keep an eye on it as it was prone to falling off

.
He gave it to me when I bought his Turbo seats, smoothed boot, bumpers and other bits. I threw it over the wall at the tip as it had a hole burned in the lining.
You’ll need a filter for the breather too. See post 6 picture 6 here -
https://www.fiatforum.com/showthread.php?t=28070
They can be fitted else where with additional piping for example, Ghost’s Cinq
https://www.fiatforum.com/gallery/showphoto.php?photo=3873&cat=500&ppuser=1632
Are you keeping the Uno?