The cub diesels have the same muffler as the B4200 and B5100. The B6100 and B7100 are the same bolt pattern and shape but are longer. The B6200/B7200 have a longer elbow, and would not look right on our Cubs. The 1st picture is a B7100 (which is identical to ours, but longer), the 2nd picture is the B7200.
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