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Uni Filter 1.5" Flex Core Sock Filter


Uni Filter

Model #U-401

Shopper Award

Uni Universal Air Filters is where it all started over 50 years ago. Make a trick filter that clamps directly to the carburetor. For use on motorcycles, go-karts, tractors, air compressors, snowmobiles, anything with a carburetor can benefit from a Uni. Please note: actual filter may differ from image shown. Image is for reference only, all filters are sold individually.

Uni Filter products perform their best in the worst of conditions. That's why Uni has been the chosen air filter of all serious offroaders for decades. In this dirty, dusty environment, air filtration is extremely critical to the performance and protection of the engine.


  • Uni Filter's patented seamless design allows for maximum air flow
  • The flexcore spring design lets the filter curve for easy installation
  • The flex core spring aids in shaking off dirt build-up during use
  • Not legal for use on pollution controlled vehicles in the state of California

  • Internal Diameter: 1 1/2"
  • Outer Diameter: 2 3/4"
  • Length: 4"

Other Part Numbers:
Uni Filter #U-401

Proposition 65

/!\ warningWARNING: Cancer and Reproductive Harm


Who Is Uni Filter?

Uni Filter is an aftermarket company that entered the air filtration industry in 1969. Their goal was straightforward; design an air filter that works.

Starting with polyurethane foam as their air filtration medium, it revolutionized the air filter industry, especially at the time when other companies used papers. 

They discovered that Polyurethane is better in capturing dirt while having the capacity to be easily cleaned and reused. Today, Uni Filter is one of the leading brands in the air filter market.

Wide Range Of Products

Uni Filter offers one of the most comprehensive lines of foam air filters in the world. Each filter has been carefully designed to trap as much dirt as possible while allowing air to pass through. Their innovative design has allowed them to be the choice of many racers and enthusiasts who only want the best.

The Best Filter In The Market

All Uni FIlter products are tested to work even with the worst weather conditions. It is the reason why they are the chosen filters of many hardcore and serious offroad racers. With the dirty, dusty environment, it is important to have an air filtration unit that is up to the task. Uni Filter plays a critical role in providing performance and protection of the engine. 

Purchase Uni Filter At Vivid Racing

If you are in the market for a high quality air filter for your vehicle, then look no further as Uni Filter is the brand for you. Whether for a street machine or a dedicated racer, they have the right parts for you. To know more about Uni Filter and what they can offer, visit Vivid Racing and check out their list of products that fit your specific requirement.

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