--- product_id: 4635671 title: "Uni Filter - BF-1 BF1 12\" X 16\" X 5/8\" 65-PPI Green Fine Foam" brand: "4into1" price: "1216543β‚«" currency: VND in_stock: true reviews_count: 13 category: "4into1" url: https://www.desertcart.vn/products/4635671-uni-filter-bf-1-bf1-12-x-16-x-5 store_origin: VN region: Vietnam --- # 12" x 16" x 5/8" precise dimensions 65 PPI ultra-fine foam Vehicle-specific fit Uni Filter - BF-1 BF1 12" X 16" X 5/8" 65-PPI Green Fine Foam **Brand:** 4into1 **Price:** 1216543β‚« **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Elevate your engine’s breathability with precision foam filtration! ## Quick Answers - **What is this?** Uni Filter - BF-1 BF1 12" X 16" X 5/8" 65-PPI Green Fine Foam by 4into1 - **How much does it cost?** 1216543β‚« with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/4635671-uni-filter-bf-1-bf1-12-x-16-x-5) ## Best For - 4into1 enthusiasts ## Why This Product - Trusted 4into1 brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Durable & Lightweight Design:** At just 0.8 ounces, this foam offers robust protection without adding bulk or weight. - β€’ **Trusted by Enthusiasts & Pros:** Highly rated with 4.7 stars from 793 reviews, a go-to choice for powersports and automotive air filtration. - β€’ **Versatile Custom Applications:** Perfect for rebuilding OEM steel cage filters or crafting custom air filters for motorcycles, ATVs, and lawn mowers. - β€’ **Unmatched Filtration Precision:** 65 PPI green foam traps the finest dust and debris for superior engine protection. - β€’ **Tailored Fit for Peak Performance:** Designed to fit specific vehicle models ensuring optimal airflow and filtration efficiency. ## Overview The Uni Filter BF-1 is a 12" x 16" x 5/8" green fine foam air filter with 65 pores per inch, engineered for vehicle-specific applications. It offers superior dirt and dust filtration through open-cell polyurethane foam treated with specialized filter oil, making it ideal for ATVs, motorcycles, and lawn mowers. Lightweight and durable, it’s a trusted, high-rated solution for custom and OEM filter rebuilds. ## Description Uni filter ATV air filters keep out all the dirt, dust, and mud providing superior engine protection. The principle of how foam air filters work is simple, open cell polyurethane foam is wetted with specially developed filter oil. The sticky filter oil. Review: Great alternative when nothing else is available - good OEM style foam to rebuild steel cage filters with! Review: 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! ## Features - Hi-Flow Green Filter Foam Sheet - 12 Inches x 16 Inches x 5/8 Inch - Unlimited Potential for Use in Custom Applications - Fit type: Vehicle Specific ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000ONZT5E | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #36,415 in Automotive ( See Top 100 in Automotive ) #87 in Powersports Air Filters | | Brand Name | 4into1 | | Customer Reviews | 4.8 4.8 out of 5 stars (794) | | Fit Type | Vehicle Specific Fit | | Global Trade Identification Number | 00804451070335 | | Included Components | Uni Filter BF1 12" X 16" X 5/8" 65-PPI Green Fine Foam | | Item Dimensions L x W x H | 16"L x 12"W x 0.58"H | | Item Type Name | Air Filters | | Item Weight | 0.05 Pounds | | Manufacturer | Uni Filter | | Manufacturer Part Number | 82-0001 | | Manufacturer Warranty Description | Limited Manufacturer | | Model Number | BF-1 | | OEM Equivalent Part Number | BF-1 | | Product Grade | Tuning | | UPC | 804451070335 | | Unit Count | 1 Count | ## Product Details - **Brand:** 4into1 - **Fit Type:** Vehicle Specific Fit - **OEM Part Number:** BF-1 - **Product Dimensions:** 16"L x 12"W x 0.58"H - **Product Grade:** Tuning ## Images ![Uni Filter - BF-1 BF1 12" X 16" X 5/8" 65-PPI Green Fine Foam - Image 1](https://m.media-amazon.com/images/I/91ZLhKILzXL.jpg) ## Questions & Answers **Q: what adhesive is best for creating motorycle air filters?** A: I use brushed on contact cement for the initial adhesion, then put a bead of silicone all around the seam, about 1/2 inch wide both inside and out. I do not trust just the contact cement to hold foam together long term, but it works great to hold the two ends together while the stronger silicone has a chance to cure. I do not glue the foam to the metal frame. I simply glue the foam together and slide it over whatever filter frame you are using. **Q: I have a Honda gyro scooter, the old filter looks to be about 3/8 to 1/2 inch thick, will this be too thick for it?** A: It is made from foam and will squish to make it fit. I put this foam in my cars to be a pre-cleaner to keep the paper air filter super clean. It works exceptionally well. The fit is a little tight sometimes, because space under the bottom of a flat type air filter can be limited. But, the foam sheet is soft enough to squish down underneath and work just fine. Most of the time I can only use 1 layer of foam. Once I tried to roll it up in a ball and stuff it into a round tube intake hose that led to the air filter itself. The multiple layers in the ball caused a check engine light to come on with an "intake restriction" code. So I took it out and just left the flat piece of foam in the air filter box. I also put some air filter oil massaged into the foam. It helps collect fine dust, and you wash it out and re oil it about every 20k miles. This keeps the paper flat filter clean as new for 50k miles or more. I went 100k miles in an old 1990 big Chevy Van and the paper filter stayed completely clean. I used foam over the air cleaners in all my tractors and dirt bikes and motorcycles. The paper filters were useless without the foam covers. The foam ones on the bikes would never plug up, even when they were covered with mud and dust. It has to do with the foam flexibility and larger pores in the foam and thicker layer of foam than the thin layer of paper. When you use foam, the engine will run cleaner and last longer, due to fewer bits of abrasive dust grinding away pistons and cylinders. Combine that by using Mobil 1 synthetic oil and changing it every 3000 miles, and your car will last for 300,000 miles. I ran an Acura Integra 300,000 rough miles doing that, and then sold it for $700 because it still ran like new! **Q: will this work on weber carbs** A: I used it on a snowmobile air intake. We cut to fit. Works good. I don't know about Weber carbs, sorry. **Q: Would this foam filter matierial work well in regular vehicles? Using on an inline 2.0L turbo.** A: I think it would work well assuming it fits snug. Please note it needs to be oiled to provide proper filtration. My application was for a mower. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great alternative when nothing else is available *by A***R on October 31, 2025* good OEM style foam to rebuild steel cage filters with! ### ⭐⭐⭐⭐⭐ Great stuff! *by O***O on October 6, 2015* 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! ### ⭐⭐⭐⭐⭐ Good quality *by R***L on June 27, 2025* Works good to make air filter for my motorcycle and lawn mower ## Frequently Bought Together - Uni Filter - BF-1 BF1 12" X 16" X 5/8" 65-PPI Green Fine Foam - UNI Filter Foam Filter Oil (1) - UNI Universal Filter Foam - 12" x 24" x 3/8" - Black --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/4635671-uni-filter-bf-1-bf1-12-x-16-x-5](https://www.desertcart.vn/products/4635671-uni-filter-bf-1-bf1-12-x-16-x-5) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-26*