[Tigers] Exhaust Manifold question

[George Re]

I am just about to send my manifolds out for coating but have run into a small problem. There are 2 tubes on the Right manifold one goes to the choke and one goes to the bottom of the air cleaner HOW do you remove the tube (the one that goes to the bottom of the cleaner) from the manifold? I have no idea and can not find any info on it. Thanks in advance 

George Re