I had a request for this so here is the link. I got one for my Bolens H16 as well.
521017M91 - Muffler for Massey Ferguson Lawn Mower/Garden Tractors | Up to 60% off Dealer Prices | TractorJoe.com
521017M91 - Muffler for Massey Ferguson Lawn Mower/Garden Tractors | Up to 60% off Dealer Prices | TractorJoe.com