Review on Hoover 40110004 WindTunnel Final Filter by Melissa Brewer

I have an upright Hoover U5491-900 that fits in Y-bags. This exhaust filter is the same part that the unit originally came with. A few reviewers have mentioned that this is not a framed pleated filter or HEPA filter, which is true. This is a normal sponge, just a piece of white filter material. However, this is a nice thick genuine Hoover piece. My vacuum cleaner exhaust grille was made with a door and plastic tabs and crossbars that hold the filter in place. I don't think any other species will do it. I use 3M HEPA bags and under the bag the vacuum also has a small pre motor filter similar to this one. The baghouse and engine pre-filter are clean but this exhaust filter is dirty so I suspect the engine is adding oil, engine brush particles or other dirt to the air so it's good to find this Revain replacement.