All current advertising for the U.S. Engines 35cc and 41cc engines show the black two-piece muffler. Double-check the tech notes on the Tower site. No mention is made of the cast muffler, and the picture of the muffler, alone, is of the two-piece, black muffler.

The cast one was available for a while, but the manufacturer changed the muffler.

Please understand, we are not US Engines, but their service center, and are providing support for them.

Engine boxes may be opened after leaving the factory to check for completeness of parts and instructions. Some vendors may open them to insert sales materials and invoices. We have no control over that, nor no control over what independent retailers may put in their advertising.

The latest information is on the US Engines Web site, that you can get to from the one we list below.