Cracked manifold?

[KrayzieFox]

I think my exhaust manifold might have cracked but I'm not 100% certain so I wanted to check with you guys for symptoms. I'm hearing some strange kinda fluttering type of sound from -10 inHg to 0 but it only seems to be present once the engine warms up.

Where should I check for cracks and how do I confirm it?

[jmv]

i noticed mine by pulling off the heatshield and seeing small black spider webbed lines in between the runners

[zuku26]

I know I have the same cracks in between the runners. I'm just sure if they've gone through yet. What are the symptoms of a cracked mani? Does the car run strange in any way?

[Brad-MSP]

Mine was cracked as well i just took it off and had it welded