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Post-installation tuning or recalibration may be required for optimal performance
This changes the character of the exhaust note
easy installation
Proudly manufactured in the USA and backed by a lifetime warranty
where it disperses and redirects the exhaust flow before it reaches the screen
Performance Muffler Cover – Fits Stihl 661 Outlet Direction:Facing Bar Post-installation tuning or recalibration mayAerospace Grade Performance Exhaust System for STIHL MS 661 Enhance power and improve engine cooling with this precision engineered exhaust system designed for the STIHL MS 661. Made from lightweight 6061 T6 billet aluminum, a high strength aerospace alloy known for excellent heat dissipation, the one piece muffler cover optimizes exhaust flow while helping to keep your engine cooler and extend component life. Proudly manufactured in the USA and
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