M
MasterMech
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For all those wondering how far off a dual-port muffler for a MS440/460 (or the 044/046) is from the standard US muffler. Check it out. (Dual-Port muffler is standard equip. on the Austrailian MS460 Magnum)
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92558-5c0964798dba1d5660954dc6953c6790.jpg)
The USA OEM muffler vs. the Oz Dual-Port. This is a Stihl OEM part, not the NWP aftermarket unit.
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92557-3f6a7ea64cbfefc9caa565d2b34e20d5.jpg)
The difference in the side ports alone is massive.
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92559-fff877547771e4c83e00a94f599f80be.jpg)
While the USA muffler isn't very restrictive inside, the Oz muffler is even less so with no deflector at all.
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92565-2704e74e8bd5b0d0fbda4347e07284eb.jpg)
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92554-24cf61a94de0318e5fdcbeb456e202fa.jpg)
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92558-5c0964798dba1d5660954dc6953c6790.jpg)
The USA OEM muffler vs. the Oz Dual-Port. This is a Stihl OEM part, not the NWP aftermarket unit.
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92556-29a61326c385224f19831d3c3d10dfb3.jpg)
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92557-3f6a7ea64cbfefc9caa565d2b34e20d5.jpg)
The difference in the side ports alone is massive.
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92555-75e5c2258154ed2530b65c6af30da079.jpg)
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92559-fff877547771e4c83e00a94f599f80be.jpg)
While the USA muffler isn't very restrictive inside, the Oz muffler is even less so with no deflector at all.
![Dual Port Mufflers, A Comparison Dual Port Mufflers, A Comparison](https://www.hearth.com/talk/data/attachments/92/92565-2704e74e8bd5b0d0fbda4347e07284eb.jpg)