UNI FILTER

Uni Filter Foam Air Filters, Pods and Filter Oil

Uni Filter listings are a part-number catalog: NU- codes are replacement elements cut for one air box, UP- codes are pods that clamp onto a carburetor or intake. We list about 535 Uni Filter products, nearly all of them air filters, with about 380 in Motorcycle Air Filters and about 150 in UTV | ATV Air Filters. Honda (about 105 titles), Yamaha (about 95), Kawasaki (about 70) and Suzuki (about 55) lead the make names.

Uni Filter's own "Why Foam" page says the company was founded in 1969 and makes open-cell polyurethane foam filters that are oiled, washed, re-oiled and reused.

Replacement elements

About 70 titles read "Replacement OEM Air Filter" followed by a make, such as the Honda NU-4108, the Yamaha NU-3215, the Kawasaki NU-2363 and the Suzuki NU-2436. Street bikes show up too: the Ducati NU-8302, the BMW NU-7301 and the Triumph NU-3006. For Harley-Davidson there is the Big Twin and Sportster NU-3403 for '66-'85, plus the Honda Interceptor NU-4122 for '90-'97.

Competition and older dirt bikes

About 25 listings are "Multi-Stage Competition" filters named by year and model, many for older machines: the YZ80 filter for '84-'86, the CR125R, CR250R and CR500R filter for '86, the Honda ATC250R filter for '82 and the Maico 490, 400 and 250 filter. KTM and Husqvarna have about 30 titles of their own, among them the KTM and Husqvarna NU-1417ST.

Quads and side-by-sides

Polaris (about 20 titles), Arctic Cat (about 15) and Can-Am (about 10) cover the larger machines. Examples are the Polaris NU-8516ST, the Can-Am NU-8707ST and the Can-Am UK-1920ST filter kit. Newer entries include the CFMOTO NU-8714ST for '20-'26 models.

Pods, breathers and universal sizes

About 65 pod filters are listed, split into centered and angled shapes, such as the 2-stage centered UP-6300ST and the 2-stage angled UP-4125AST. Ten snowmobile pods give the inside diameter in the title, like the straight 3-inch UP-6300S. The universal PK-22 street bike filter is sized by inside diameter, and nine breather filters come as clamp-on or push-in, such as the clamp-on UP-101 in 5/16 inch and the push-in UP-122 in 3/8 inch.

Oil, cleaner and foam

Seven Flex Core sock filters, like the green U-602, and bulk foam sheets such as the green BF-1 round out the range. In Chemicals & Lube you can find the UFC-300 filter cleaner, the UFF-100 filter oil in an aerosol and the 16 ounce UFF-16 oil bottle.

Matching the filter

Match the part number to the machine, then check the make, model and years in the title. A few titles name only the make, so confirm the air box or intake size on the listing before ordering. Our fitment guide covers the checks.

Uni Filter questions

Do I need oil with a foam filter? Uni Filter's page describes its filters as oiled foam, so keep filter oil and cleaner with your order.

What is the difference between NU and UP codes? NU titles name a make or model, while UP titles describe a pod shape.

Can I clean and reuse one? The brand describes washing, re-oiling and reusing its filters.