best tool to remove broken stud.

[Blacknwhitepit]

Get one of these. They have cams that tighten as you loosen the stud.

http://www.autobarn.net/xxxw-ast201.html

 

[jdcompman]

Take the manifold off, flip it upside down and clamp the stud into a bench vise and then just turn the whole manifold to remove the stud.

 

[cegreen]

Problem is already solved

In case you didn't notice, the OP has already solved the problem.

See post #35.

-Chris