1. UTV-ATV Air Filters Items
  2. sku: 2281398011850792
  3. UNI NU-4131ST

UNI NU-4131ST Air Filter

fits model: Crf70, Xr70. make: Honda. year: 1997–2021.

Nu-4131st Uni Air Filter For 1997-2021 Honda Crf70 Xr70

( Brand: Uni ), ( Part Type: Filter ), ( Manufacturer Part Number: NU-4131ST )

Review UNI Air Filter Honda fits CRF70 XR70 1997–2021

Introducing the UNI Filter Nu-4131 Air Filter, specifically designed for Honda CRF70 and XR70 models manufactured between 1997 and 2021. This air filter is an essential component of your motorcycle's engine system, ensuring optimal airflow and filtration for peak performance and longevity.

The UNI Filter Nu-4131 is a high-performance, pleated paper air filter that utilizes a unique folding process to increase its filtering surface area. The filter's pleats are densely packed, allowing it to trap even the smallest particles, while maintaining excellent airflow for a consistent power delivery. This results in improved engine efficiency and reduced emissions.

The filter is designed to fit securely in the OEM airbox, ensuring a perfect seal for maximum filtration and minimal air leakage. The filter's dimensions are 7.5 inches long, 3.5 inches wide, and 1 inch thick, making it an exact match for the Honda CRF70 and XR70 models.

The UNI Filter Nu-4131 is made from high-quality materials, ensuring durability and long-lasting performance. The filter is washable and reusable, which not only reduces costs but also minimizes the environmental impact of disposable filters. To clean the filter, simply rinse it with warm water and allow it to dry completely before reinstalling.

In conclusion, the UNI Filter Nu-4131 is a premium air filter solution for Honda CRF70 and XR70 motorcycles produced between 1997 and 2021. It offers exceptional filtration, improved engine efficiency, and durability, making it an essential upgrade for any rider seeking optimal performance and longevity for their motorcycle.

Uni Filter Nu-4131 Air Filter for 1997-2021 Honda CRF70/XR70: A Comprehensive Analysis

1. Pros:

a. High-performance filtration: Uni Filter Nu-4131 is designed to provide efficient filtration, ensuring that your Honda CRF70/XR70 engine is protected against dust, debris, and other contaminants.

b. Long-lasting: This air filter is known for its durability and can last up to 5 times longer than OEM filters, resulting in fewer replacement costs and less frequent maintenance.

c. Easy installation: Uni Filter Nu-4131 is designed with easy installation in mind. It fits perfectly in the stock airbox and doesn't require any modifications.

d. Improved engine performance: By allowing air to flow more freely, this air filter can improve engine performance, resulting in better acceleration and power.

2. Cons:

a. Cost: The Uni Filter Nu-4131 may be more expensive than some OEM filters, but its long lifespan and performance benefits can offset the initial investment.

b. Not suitable for severe conditions: While this air filter is effective for most riding conditions, it may not be the best choice for extremely dusty environments.

Conclusion:

The Uni Filter Nu-4131 is an excellent choice for those looking for a high-performance, long-lasting air filter for their 1997-2021 Honda CRF70/XR70. Its efficient filtration, improved engine performance, and easy installation make it a worthwhile investment. However, its cost may be a concern for some riders, and it may not be suitable for those riding in extremely dusty conditions.

Recommendation:

If you're looking for a reliable, high-performance air filter for your Honda CRF70/XR70, the Uni Filter Nu-4131 is an excellent choice. Its benefits, such as improved engine performance and long-lasting durability, outweigh its potential drawbacks. However, if you frequently ride in extremely dusty conditions, you may want to consider a more heavy-duty air filter to ensure optimal engine protection. Overall, the Uni Filter Nu-4131 is a solid investment for any Honda CRF70/XR70 rider.

part # nu4131st prices

  • $9.59-$30.02

specifications filterblank:

  • for models: Crf70, Xr70
  • for makes: Honda
  • for years: 1997-2021
  • brand: Uni
  • part type: Filter
  • manufacturer part number: NU-4131ST

returns filterblank:

  • policy: Returns Accepted
  • paid by: Buyer
  • time: 30 Days

payments filterblank:

  • credit card: Diners-club
  • wallet: Google-pay
  • other

general filterblank:

  • ATV, Side-by-Side UTV Parts Accessories > Air Intake Fuel Delivery > Air Filters
  • condition: New

shipping filterblank:

  • cost: $0.00
  • service: Standard
  • class: Standard
  • transit: 3-7 Days
  • type: Fixed

seller filterblank:

  • # reviews: 11827
  • rating: 98.9%

offer filterblank:

  • started: February 25, 2025
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock
  • quantity: 4
for models: crf70, xr70, for makes: honda, for years: 1997-2021, part type: filter,
category: atv parts > atv, side-by-side utv parts accessories > air intake fuel delivery > air filters, sku: 2281398011850792,

Uni NU-4131ST Is Similar To:

filterblank logo
5 offers $9.59–$30.02 USD
  • Offer #1: $9.59 price + $8.60 delivery = $18.19* total. And the rest is history.+$8.60 shipping
  • Offer #2: $30.02 price + free delivery = $30.02* total. Designed to fit in the factory air box exactly like original filter. 2004-2015 Honda CRF70.FREE SHIPPING
  • Offer #3: $30.02 price + free delivery = $30.02* total. Honda CRF50F 2000-2003. Honda CRF70F 2004-2009.FREE SHIPPING
  • Offer #4: $17.99 price + $9.75 delivery = $27.74* total. Clean easily with grease-cutting dishwashing detergent; just clean, oil and reuse, Two-stage air filter comes apart for maximum airflow and ultimate cleaning, Unsurpassed in airflow, stopping dirt and overall performance, Fits in stock airbox exactly like OEM filter, Made in the USA.+$9.75 shipping
  • Offer #5: $14.88 price + free delivery = $14.88* total.FREE SHIPPING