Keep your saw running cooler and increase cutting speed. Rubber plug is included to close port while not in use. This muffler contains no spark arrestors.  

  International shipping to many countries. No returns.  

   Besides the 55 and 51, this fits the 154 and 254/254Xp series saws. 

  Please see my other items.

 I have been producing and selling performance based high flow chainsaw mufflers since 2018. If any of MY mufflers fail due to my workmanship, I will repair or replace the muffler free of charge to the original purchaser. Buyer pays one way return shipping only.

   Thank you for your interest and support.