Ported Stihl MS 661 specs involve custom engine work (porting, matching, exhaust) to significantly boost its already robust 91.1cc, ~7.2 bhp power, resulting in much faster cutting, often used for competitive logging or extreme forestry, with shops like Buxton Work Saws offering builds that enhance airflow and exhaust for high-RPM performance, adding features like custom exhaust systems (e.g., EPS Straight Shot) and precision porting, making it a beast beyond stock for demanding users. 😎😎 #fbl
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