Exhaust port thread repair

Looks like a good repair. Is the bronze insert threaded in to the head, or just shrunk in?
Sorry for the delay as I’m not on here often.
It’s an aluminum / bronze material. Threaded internally and externally. Locked in place with high temperature red loctite.
 
View attachment 113166Another 750 Norton Commando exhaust port repair done. Shipping out today
Done here in Ottawa, Ontario, Canada.
dzldanz@gmail.com
I can vouch for his work. I was somewhat local and he had mine done in one day.

Exhaust port thread repair
 
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