Went to a friends house yesterday to fell a 34" diameter White Oak. After seeing and hearing my 390XP run, he asked me if I could do his MS310. I fabricated a new part for the original port cover. I used 1/2 " inside dia. conduit for the pipes. Retuned & tested it in some oak and maple. He is going to be really happy. Runs much stronger now. Here are the results.
![310muffmod003ce2.jpg](https://proxy.imagearchive.com/d5c/d5c5d24ae53cd3b4ef8b0f5baa913b44.jpg)
![310muffmod001custombm5.jpg](https://proxy.imagearchive.com/b3f/b3f9f7585f9adf6029d3bd05fbbd919e.jpg)
![310muffmod002customic9.jpg](https://proxy.imagearchive.com/220/220d3b4bbd02d0d414ce8872aac1c24e.jpg)