Slow progress as life and work still have to happen.
I did manage to get out all the stuck and broken exhaust studs with the excellent Stomski Racing Exhaust Stud Repair Kit SR065. I purchased 14 ARP stainless exhaust studs to replace them all.
I made a time lapse video of drilling out one of the studs with the kit. It shows that with time and a little care anyone can repair a broken exhaust stud on a 911 engine.
https://www.youtube.com/watch?v=vMnFlCmDM_A
As I don't have any further need for the tool it is now for sale here on Pelican. I paid $308 shipped for the tool from Stomski, I used my own drill bits and lots of lube to keep the tool in pristine shape. I am asking $270 for the tool, funds from its sale are going straight towards the next item on the punch list. Maybe someone following this thread has a broken stud they need to drill out.
Stomski exhaust stud drill out kit
