I have been wanting to open up the muffler on my Stihl 020T. I was reluctant because this requires tearing half of the saw apart. Well the other night was boring so I decided to go ahead with the project. While I was in there I replaced the impulse line and the started cord. Ken Dunn had stated in a past thread that the muffler on these saws were really restricted. After talking to Ken I found that that he was talking about the MS200T. Although this is an older 020T, it was not without it's restrictions too. I took off all of the interlacing fingers that are right at the exhaust port inside the muffler. I then drilled a 5/8 hole at the outlet. I like screens on my saws. I made up a bracket out of .080 aluminum to hold the screen in place. I haven't cut with the saw yet, but by the sound of the exhaust note and the better throttle response I am confident this was worth the time.