ARSPORT Predator 420cc, GX 270cc Stainless Steel Threaded Exhaust Adaptor Flange.

This was exactly what I needed to adapt the exhaust on a 352cc Loncin/Husqvarna engine to NPT pipe for the muffler that was on [opposite side of] the 13HP Briggs it replaced. Mine went on studs and the nuts I selected did not have clearance for a socket or box wrench; an unavoidable geometry limitation the included bolts would not have. This part saved some serious fabrication or finding the expensive 'real' muffler the mower hood might not have cleared.

I bought this adapter, to convert my generator over to a much quieter exhaust system, using a walker muffler, some plumbing parts, exhaust parts, and some hardware from menards. The whole setup is way better, and a lot quieter, than before, The adapter is a quality built stainless part, good welding, and machining, that came with screws, and should last a long time. Works for me. Thanks.

A little on the pricey side but it worked well. The sizes given were proper so it fit like a glove. It is a 1" NPT pipe thread and will fit the black pipe you find at HD or the hrdw stores. I have a probably Chinese made 15HP 7.5kw port generator that i modified the exhaust on so I can put the port gen in a small plastic shed and used the adapter to get the exhaust outside the shed through a whole lined with heat proof board after cutting a hole in both the board and the shed... worked great...

Worked like a champ.