Site Information

 Loading... Please wait...
Call (800) 447-4726 or (541) 826-8301
  • Complete filter kit for MS661 chainsaws.  Included in the kit is the black cover, filter cage, custom backing plate and two re-usable filter elements.
  • Complete filter kit for MS661 Chainsaws.  Included in the kit is the black cover, filter cage, custom backing plate and two re-usable filter elements.

MaxFlow Air Filter for Stihl® MS 661 Chainsaws

$99.95 $89.95
(You save $10.00)
SKU: MF661

Product Description

The Max-Flow filter kit to fit the MS661 that professionals are raving about.  Cover is industrial black color.


High Flow, washable air filters for Professional Stihl® MS661 Chainsaws with the polyolefin HD2 filter.  Models MS661, MS660C-M, MS661R C-M.  Kit includes everything you need to convert your saw:  Two foam elements, (one green for standard cutting and one white for extreme cutting conditions), Maxflow cage, custtom backing plate and an OEm style close fit rain cover.

MaxFlow Filters are the ONLY aftermarket filters that are 100% USFS approved.  Don't risk being shut down on Forest Service property.  Reference the (MSE) SAG HS type A. 

MaxFlow air filters trap the smallest particles while flowing twice as long as stock air filters.  This helps your saw breath better during prolonged use in adverse conditions, resulting in smoother running and more power.  Unlike pleated filters, MaxFlow filter elements are washable and re-usable so they last longer and cost less.  Foam elements do require the use of foam filter oil (sold separately).

For more than 20 years MaxFlow filters have featured only ONE PIECE elements with no glued seams to fall apart.  No seams mean longer lasting elements with no chance for dirt to penetrate.  Don't be mislead by glued foam where gas and vibration causes the glue to fail.

MaxFlow filter kit replaces the Polyolefin HD2 Stihl Pleated Air Filter P/N: 1144 140 4400

Replacement of the air filter on Non-HD filter equipped with Fleece, Flocked or Screened Air Filters will require installation of the Stihl HD backing plate and other parts (not included).

Remarkeable videos of the Max-Flow filter on an 066 chainsaws.  Watch how a professional does it, these videos are great.  Click on the video button.






Product Videos

falling a bigger sugar pine 14:27

This was a big timber sale in Strawberry Valley, California. A lot of sugar pine in this part of CA. This tree was barely over 100 years old. Fast growing stuff.

  • falling a bigg...
    This was a big timber sale in Strawberry Valley, California. A...
  • falling a nice...
    This was in Sierra County, California on the north bank of Goo...
  • TKDT doing it up
    This was on some on some pretty steep ground with really narro...
  • The chainsaw g...
  • Hired Stihl s...
    Ugly Hound and his faithful sidekick Pat Lacey cutting a Sitka...

Warranty Information

Equi-Tee Mfg, warrants this product to be free of defects in manufacture for 30 days from the time of delivery.

Find Similar Products by Tag

Product Reviews

Write Review

  1. Fresh Clean Air 5 Star Review

    Posted by on 12th Mar 2018

    Loving this Filter Kit by Max Flow. The Stihl MS661 Magnums have a reputation of not so good sealing properties around the backing plate(Carb Cover)and the HD filter. Tiny particulates make their way in between and right to the carb. I'd have to check and clean between each tank of fuel. Got this kit and like always, Seals awesome and filters Great, no more dust in carb. Saves time, eventually $$, and makes the boss happy since more stumps are made!

  2. Great stock look with aftermarket added power. 5 Star Review

    Posted by on 8th Mar 2018

    Great stock look. Adds great power with air cleaning efficiency.

  3. Close too factory fit. 5 Star Review

    Posted by on 9th Dec 2017

    Nice fit and finish. Time for them to upgrade the molds for other models.

  4. Perfectly molded 5 Star Review

    Posted by on 23rd Feb 2017

    The cover for the 661 fits perfect! Hope you guys do the same for the 461.

Find Similar Products by Category