These are so close the only way to tell if they are Reproduction is to rev your motor up, get the manifolds nice and hot then spray cold water on them. The Originals from Pontiac Motor Division will crack right away. That is Nodular Iron for you
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Title: Exact Repros
Description: These are so close the only way to tell if they are Reproduction is to rev your motor up, get the manifolds nice and hot then spray cold water on them. The Originals from Pontiac Motor Division will crack right away. That is Nodular Iron for you
