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Header Installation

The final step in system-removal is stripping the stock manifolds from the engine. Six 13mm bolts on each side hold the manifolds in, and will have to be wrenched out because they are clogged with factory GM sealant. Note that there are multiple bolts on each manifold which do not need to come out; shinier bolts hold the manifold heat shield and can stay in place for now.
Header Installation - Solely Stainless, Totally Tubular

 The final step in system-removal is stripping the stock manifolds from the engine. Six 13mm bolts on each side hold the manifolds in, and will have to be wrenched out because they are clogged with factory GM sealant. Note that there are multiple bolts on each manifold which do not need to come out; shinier bolts hold the manifold heat shield and can stay in place for now.  View Related Article

 

 

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