Sounds like somebody is trying to sell you the Brooklyn Bridge, you might try it again, towerpro.com works, torquepro doesn't. The pipe was $9,90, shipping $25 to USA. Muffler is $30. These require the heat proof coupling for joining.. You might try all the threads on this engine, somebody may have come up with an alternative . I saw one say a muffler reduced the power output ? Haven't run mine yet so I don't know. Also, check out Vogelsang USA website. They have Exhaust Solutions for the engines they sell. Might give you some ideas for a custom exhaust. Good Luck .