MaxFlow® High-Flow Air Filters – The Professional’s Choice for Stihl & Husqvarna Chainsaws

Welcome to the MaxFlow® category at HL SUPPLY — home to the original high-flow washable air filter kits trusted by professional loggers for over 30 years. MaxFlow® filters are engineered to deliver dramatically longer run times, more power, and smoother performance in the dustiest conditions by providing nearly double the airflow of stock pleated filters — all while trapping the finest particles.

Unlike disposable paper or pleated filters, MaxFlow® elements are washable, reusable, and feature seamless one-piece foam construction (no glued seams to fail). Simply clean, re-oil, and reinstall — saving you time and money season after season.

What You’ll Find Here

• Complete MaxFlow® conversion kits for popular Stihl models (MS440/044, MS500i, MS660/066, MS661, and more)
• Genuine MaxFlow® replacement foam elements – green (standard) and white (severe duty)
• Accessories like foam filter oil and cleaning supplies
• Detailed installation guides and compatibility info

MaxFlow® is the only aftermarket filter 100% USFS approved (MSE SAG HS type A) — safe for Forest Service property with zero risk of shutdown. Proudly made in the USA.

Run longer, clean less, and cut harder — explore MaxFlow® products below and upgrade your saw today. Fast shipping and expert support from HL SUPPLY.