I think there is some legit small differences. The Vette has a straight shot intake air bridge, bypass valves in the mufflers, and I believe the exhaust manifold may be a hair better. They are center exit/collector, where as the Camaro manifolds are log style.
The casting to the Camaro exh manifolds is horrible also. The heads have nice D shaped ports, and the manifold ports look like Ray Charles tried to draw a D. A log style manifold with mismatched ports has to be holding back a few ponies. I can't believe they put that manifold on a performance car.
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