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Part Number:
100-0104

With a name like "Bark Box®," Westcoast Saw lets you know exactly what you're getting! This muffler cover is constructed out of stainless steel and hand TIG welded. It also has a spark arrester built in. Made in the USA.
Expect cooler running temperatures, a rowdy sound, and 6-10% horsepower gain.
Installation Note: If your saw is M-tronic it will be tuned in by the third or fourth cut after installation. If your saw is non M-tronic, we recommend re-tuning after installation.
Bark Boxes are compatible with 2-piece muffler covers only.
Specs
Ⓓ CANADA DESIGN REG. NO. 210518, WESTCOAST SAW, LLC
Stihl® is a registered trademark of Stihl® Incorporated and is used only to describe their products.
Universal Power Port | Top Handle Mufflers | Clutch Cover For Select Stihl Saws
My saw really doesn't need this but it sounds ohhhhh so good cutting firewood in the canyons.
Started smiling as soon as I started the saw. Excellent power, sound, and easy installation. Used this on my MS 400 and will be ordering one for my 462. Cracks me up that some folks complain about the sound. It’s a bark box, not a whimper whistle.
Great sound
Well built