acp104
ArboristSite Lurker
Guys, I've been searching the forum for specific info on modding the 6421 cat muffler for good performance, but haven't had much luck finding anything besides "Open the seam and pull out cat/baffle". I'm thinking this is common mod, so I might not be using the search function right. If not, I'm sorry. I plan to order a BB kit from Weedeaterman soon, and would like to try removing the cat stuff and maybe adding another port to the muffler if recommended. Is removing the internals worth it? Is adding another port beneficial? If this topic has been beat to death, Maybe someone can point me to a related thread or two. Thanks.