Check out this header

[Steve V]

Pics speak for themselves.

 

[Squid4life]

There aren't too many Buick V6 headers I have seen that HAVEN'T had cranks like that at one time or another. ;

 

[robzombie]

That is very common in that area, I've tig welded stainless headers that have cracked in that area as well as other areas that you wouldn't think would have issues.

 

[we4Mateo]

That's a little guy there. Still not helping anything.

 

[wantattype2]

Pics speak for themselves.

What Brand are the headers?

 

[Boost231]

Look like Poston

 

[2QUICK2B6]

I cracked my postons everywhere they could

 

[2QUICK2B6]

 

[Chuck Leeper]

Looks to me like a cold weld.........

 

[rag231]

X2! A cold weld on two different types of metal , possibly. Looks like good penetration on the flange but none on the header tube.

 

[turbofabricator]

There are only two types of turbo headers........those that have cracked and those that will.