Verdoro ... Waldron appears to make both, SS was about $900 bare ... figure probably $1100 to your door with the hangers, clamps and such. Steel system about $600 with everything you need.
I'm pretty limited because I'm using the original stock manifolds. I've "ported" the exit of the manifolds a bit, they can be opened up about 1/8", matched the inlets, and these "stock" systems use mandrel bends instead of the horrible pinch bends of an OEM system. So I figure they are a bit better than original performance. Engine is pretty much all stock anyway.
428, I've heard that Inline can be problematic with their exhaust returns ... again I bet this is because they don't make them in-house so their margin is very low. I'll definitely post how mine fit.
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