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      What is the inside diameter of 3750067?

      Product Description: 1957-79 V8 Small Block Exhaust Manifold Heat Riser, Without Valve

      Measurements:

      • Inside diameter of curved edges: 1-7/8"
      • Inside diameter of straight edges: 1-3/4"
      • Inside diameter of round side: 2-1/8"

      EMR003

      For more information, follow the link: 1957-79 V8 Small Block Exhaust Manifold Heat Riser, Without Valve