

🛠️ Upgrade your airflow game with Uni Filter’s precision foam – because your engine deserves the best!
The Uni Filter BF-1 is a 12" x 16" x 5/8" green fine foam air filter sheet with 65 PPI density, designed for vehicle-specific applications. It offers superior filtration by combining open-cell polyurethane foam with specialized filter oil, effectively blocking dirt, dust, and mud to protect engines. Durable and rebuild-ready, it’s a trusted choice for powersports and automotive enthusiasts seeking reliable, high-performance air filtration.
| ASIN | B000ONZT5E |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #84,519 in Automotive ( See Top 100 in Automotive ) #189 in Powersports Air Filters |
| Brand | 4into1 |
| Customer Reviews | 4.8 4.8 out of 5 stars (789) |
| Date First Available | March 21, 2007 |
| Exterior | Painted |
| Global Trade Identification Number | 00804451070335 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.8 ounces |
| Item model number | BF-1 |
| Manufacturer | Uni Filter |
| Manufacturer Part Number | 82-0001 |
| Model | Uni Filter 82-0001 |
| OEM Part Number | BF-1 |
| Product Dimensions | 16"L x 12"W x 0.58"H |
| UPC | 804451070335 |
A**R
Great alternative when nothing else is available
good OEM style foam to rebuild steel cage filters with!
R**L
Good quality
Works good to make air filter for my motorcycle and lawn mower
O**O
Great stuff!
made some excellent filters with this. wish all OEM filters were made of this stuff. The filtration of the fine product is excellent and it will save your engine in dusty conditions. It prevents the entry of sand and dust into your engine so it doesn't grind your piston rings into powder, and can lengthen your engine life to easily 300K miles if you use it along with Mobil One Synthetic Oils. You can wash and reuse it several times. Do that every 20K miles or less. you can make different shapes and glue it together to make round air cleaner filter covers. once you put it on over your round style filter, the paper never gets dirty. on flat style filters you just tale out the filter, cut a piece to fit under the paper filter with a pair of scissors, and put the paper filter back in on top of it and away you go. Some filters don't have enough room for the foam to fit under or around without blocking the air passageways pretty badly, and this will cause a check engine light when the oxygen sensor causes the fuel map to go out of range. In this case you might need to make an external housing or mount it in a different way. BUT it is still a great product!
D**Z
Great quality filter
Amazing quality. Will be purchasing again.
C**M
Uni filter scores
Purchased this to make an air filter for our 2012 Polaris RZR 800. We made the massive mistake of using a popular after market filter on the machine because it was a washable, reusable foam filter. It let through the fine dust of Utah and cost us a top end job after 1500 miles. The fine print on the other filter says the warranty isn't valid in dusty, off-road conditions. My husband used Uni Filters for years while riding trials motorcycle competitions and so we tried it for the RZR. This works far better than the aforementioned foam filter or the stock paper filter.
J**.
Well worth the value
I use it as a pre filter for my 2023 CRF 300 rally. Able to get 6 filters out of this one size. Definitely recommend to anyone with a motorbike.
G**O
Perfect material for small engine air filters
Recently, due to a major fire resulting in a 3-day power outage, I had to pull out my Kawasaki 3200w generator to keep the refrigerator and freezer in operation. Unfortunately, the foam air filter had disintegrated over time, and the engine was laboring greatly to run. On a hunch, I pulled off the air filter and saw the filter had disintegrated and was clogging the air inlet. Removing the limp remains, the engine immediately jumped to life and ran like new. Unfortunately, Kawasaki has abandoned all those who bought these generators. We are unable to purchase filters or any parts whatsoever. Luckily the Uni Filter foam material was the correct thickness to fit -- I cut it to size and it actually looked and fit factory perfect. The UNI Filter material was perfect for making replacement air filters, so I bought a second package as a reserve source in case another surprise failure among my stable full of motorcycles, mower, snow-thrower, and other equipment utilizing similar foam/oil air filters.
M**G
Great to make discontinued filters
Have a 30 year old Tanaka. The filter in it was OK till I replaced the primmer bulb. It had to be removed to get to screws. It basically dissolved to dust when I tried to remove. This sheet of filter material allowed me to make a replacement for that filter with 90% or more of sheet left to use in future. Can make quite a few of that filter if needed.
A**E
I am happy with the product. The quality is great and the shipping was fast, it worked perfectly for my 40 year old motorcycle. There was enough to make 3 air filters. 👍👍
A**R
Bought it for my motorcycle to replace the original paper filter. Cut it to shape but haven't installed yet as I'm waiting for my paper filter to get a bit dirtier before switching over, but the foam seems to be of great quality! I think it will definitely help my engine filter better with a good foam oil.
K**R
Perfect for a cheap but great replacement. I have an old atv that I like to beat to death, without putting too much money on. That Hut the spot just right: cheap but quality item, plus I can make 4 filters out of this sheet, for less than the price of one OEM. Thanks!
A**X
No issues.
A**R
I used this to make a couple of round air filters, GE silicone works perfect as an adhesive as long as you have a way to hold it in place for a day - cling wrap worked for me.
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