... and got the Pulse2,System certificate released by Danish BrUel & Kjar's3,Same as ALWITCO of USAThis ... exhaust port , especially designed for AODDP.1,the connection of our XY series muffler can be made ... muffler is one-piece molding, such as the use of filter te for a long time after ... make oxidation treatment process, can effectively prevent the aluminum alloy surface oxidation, mesh also make ...