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This kit contains all the parts necessary to convert a MCM small block V6 engine with standard cooling and no risers with the 2 pc wet joint exhaust manifold & 4" O.D. center rise 7° exhaust elbows to dry joint exhaust manifolds and elbows. Note: Engines with freshwater cooling &/or risers may require additional exhaust elbow gaskets to be ordered separately. Fits the 1987?2004 MCM V6 engines with the 2 pc wet joint or dry joint 4 in O.D. center rise 7° exhaust elbows (s/n 0W309999 and below).