Replacement OEM Muffler Assembly for your Husqvarna and Jonsered chainsaws. OEM mufflers are a high quality replacement option for your chainsaw. Mufflers take a beating over time, and sooner or later you will need to replace it. Whether it is rusted out, dented in, or you want to do your own woods port, Bailey's is your source. This muffler is the FF version, which is also known as the non-EPA version, which is less restrictive than the E-tech (EPA approved) version. These mufflers were originally designed for pre-EPA saws, and are non-catalytic. Because they lack internal converters, they offer increased performance and cooler engine operating temperatures. This muffler comes with a spark arrestor screen.