MaxFlow® High-Flow Air Filter Conversion Kit for Stihl MS661 / MS661 C-M / MS661 R C-M (HD2 Filter Models)
Unlock maximum performance and extended run times from your flagship Stihl MS661 with this MaxFlow® High-Flow Air Filter Kit.
Specifically designed for HD2 polyolefin filter-equipped models, this kit nearly triples effective filter life while flowing full CFM — keeping your saw breathing freely and delivering smoother running and more power even in prolonged heavy-dust conditions.
Trusted by professional loggers for decades, MaxFlow® foam filters trap the finest particles without restricting airflow. Washable and reusable, they outlast stock filters by up to 30× while costing far less over time (just re-oil and reinstall).
Complete Kit Includes:
- MaxFlow® high-flow cage
- Custom backing plate
- OEM-style close-fit rain cover
- Two washable high-flow foam elements:
- Green – optimized for standard cutting conditions
- White – extra protection for extreme dust & dirty environments
Key Benefits:
- Up to 30× longer life than stock HD2 filters
- Full CFM airflow – more power & cooler running
- Washable & reusable – lower cost & less waste (use foam filter oil – sold separately)
- Dual foam options – adapt to clean or extreme conditions
- Direct conversion for HD2-equipped MS661 models
- Made in the USA – proven reliability for pro use
Compatibility:
Direct fit for HD2 filter-equipped models:
- Stihl MS661, MS661 C-M
- Stihl MS661 R C-M
Note: For non-HD2 (fleece, flocked, or screened filter) saws, additional Stihl HD backing plate and parts are required (not included).
More power, less cleaning, zero downtime — upgrade your MS661 to the MaxFlow® High-Flow Air Filter Kit today. Proudly made in the USA and in stock at HL SUPPLY!
