Thanks Jim. It looks like the ones at 4into1 are Emgo mufflers.Honda primary pipes are double walled, 2 pipes in one. This retains heat in the exhaust gasses and also prevents rust thru of the pipes generally.
Mac exhausts are single wall pipes.
David Silver has the right muffler for $465, no left. CMSNL doesn't have either one.
There is a complete used CB250 exhaust, same bike smaller engine, here. https://www.jauce.com/auction/x626298675 22,000 Yen is @$200 plus shipping from Japan but only 1.5 days left on the auction.
Other obscure sourcing I have shows nothing available.
In aftermarket you might look at Emgo mufflers, Here's the catalog, mufflers start on page 208
This one looks close 80-84034 or maybe this one 80-84051
I’ll have to look more into how I can pack them. I’ve never done anything like that before. Thanks for the tip!I've put the Emgo mufflers on a few 350's and used the ones with the removable baffle and repacked the mufflers with additional packing before putting them onto the bike.
They tend to be loud/tinny and get tiring after a short time riding. The packing knocks a db's off while keeping a deeper note to the exhaust. Being able to "tune" the mufflers is a good option in my books.
Emgo 80-84013 CHROME