yeh supercharger off and replacing with a turbo

i remeber something when reading up on flaring, with aluminium it does tend to split so you might be better of with the weld slag option on the outer pipe for the same purpose. Brass does something similar when flared too.

Also keep in mind only has to be a slight flare not huge so the pipe still stays on. but this may effect air flow ever so slightly if done incorrectly in theory creating turbulence of the air flow.

if ur deadset on putting something to stop the pipe coming off tig weld a small weld onto the outside in a flew places failing that turn ur mig down low and put like a 2mm bead on it and just run a flap wheel over it so its not too sharp.