Check the listing for details. Dual port ( piped ) muffler for Stihl MS361 MS341 ZERO BAFFLING. Condition: New. Listed at 69.50 USD. A good ported muffler increases performance and reduces operating temperature.This muffler contains zero baffling and has no spark arrestors. The customary rear exhaust position has been blanked off so all exhaust goes through the front ports. The deflector has also been removed.Rubber plugs are included to close the muffler when saw is not in use.Included is gasket and screws that retain the muffler to the saw.USPS Priority Mail shipping.International shipping to many countries.I have been producing high flow performance chainsaw mufflers since 2018. I will repair or replace any of my mufflers that fail due to my workmanship to the original buyer. Buyer pays return shipping only.If you have any questions please let me know.Please see my other items.Thank you for your consideration.