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In this months Tech article we’ll be looking at Chevy Classic exhaust systems. In part 1 we’ll identify and then in part II we’ll install. First let’s look at how to identify and restore correct exhaust manifolds for 1955-1957 V8s. One of the main problems that 1957 owners encounter with exhaust manifolds is the rusting away of the inner tube in the right-side manifold. This inner tube forms a “heat chamber” for the heat choke tube. This article will explain how to replace this inner tube on the 1957 manifold as well as how to restore any exhaust manifold. Click