Spot welds on those little tabs on the inside.
If your removing the snorkels I would be interested in buying them. I have an air cleaner that has a mangled snorkel.
No problem, never hurts to ask.
Use a wire wheel to find the spot welds. Gonna have to drill through the top and bottom of snorkels most likely. Not sure if you will be able to get to the inside.
They are on the sides . The horns slide off tabs sides top and bottom I did one and cut the tabs off years ago. The guy just came back for a motor and I painted it
Consider cutting the air cleaner housing to the snorkles. Then you will have more ability to carefully remove the parts from the snorkles you don't need