How do these manifolds look?

[boxchevyman]

Im chasing a high speed overheat and wanted to get your guys opinion on these manifolds. Are they bad enough to cause a high speed overheat?

Thanks,
James

 

[boxchevyman]

Here is a link to a video of me using a garden hose to flow test these manifolds.

 

[Bt Doctur]

In most cases the riser is the culprit not the manifold

 

[Scott Danforth]

I would replace them. I also bet the risers are plugged