Silicon bronze tig rod. Flows with low heat, plenty strong.

Thanks guys. Going to get it fixed and back on the track soon !!

Lets see it when it is done?
I was thinking if the metal is too thin the section would need to be replaced, but if you just need something for a short time, weld over the crack and hope for the best.

Doug... just curious..have you had a head gasket
blow lately... that style of crack is usually a
hot (maybe lean) and all of a sudden cooled type
of crack.. just curious
EDIT
Sure it could have been a high stress zone from
the denting of it.. but the big area of the crack
opening is where it started

Don't forget to protect your ignition/electronics if you weld it in place