West Coast Saw "Bark Box" Chain Saw Muffler Face (for Stihl Saws) Model:661 ANSI Standards call for bit

ANSI Standards call for bit hardness of Rc 45-60

Belt Connection:

X-back & Y-back styles

This kit fits Stihl MS660 only

West Coast Saw "Bark Box" Chain Saw Muffler Face (for Stihl Saws) Model:661 ANSI Standards call for bitWith 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