This is an original GM exhaust manifold for Small Block Chevy engines. The casting number is 3747038 as shown. The back side is cast with what looks like "C 21 60" as shown. The 3747038 exhaust manifold is a passenger's side manifold that was original equipment on many 1958-1965 Corvette and passenger car models. This manifold will also work on many other applications. Please confirm your specific application. 

This manifold is in good original condition overall. The casting has some pitting as you may expect. I see no breaks, modifications, or repairs to this manifold. The pipe studs are intact and appear to be getting pretty thin.  The heat riser is intact and not frozen up. This is a nice OEM GM exhaust manifold. 

This is your chance to own the original 3747038 exhaust manifold you have been dreaming about at a GREAT PRICE. Don't Miss Out!

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