UNI NU-4109STA Dual Air Filter

( Brand: Uni ), ( Part Type: Filter ), ( Manufacturer Part Number: NU-4109STA ), ( Country Of Origin: Usa )

Review UNI Dual Stage Air Filter Honda fits FOURTRAX 250X TRX250X 1987–1992

Introducing the UNI Nu-4109 STA Dual Air Filter, specifically designed for Honda Fourtrax 250x models manufactured between 1987 and 1992 (TRX250x). This high-performance air filter replacement is an excellent choice for enhancing the air intake system of your ATV.

Crafted from high-quality pleated cotton gauze material, the UNI Nu-4109 STA Dual Air Filter delivers superior filtration capabilities. The dense and uniformly woven fibers trap even the smallest of contaminants, including dust, pollen, and debris, ensuring cleaner air enters your engine.

The unique dual-element design of this air filter boasts a layer of fine pre-filter media, which captures larger particles before they reach the main filter element. This two-stage filtration system further extends the lifespan of the main filter and reduces the need for frequent cleaning or replacement.

Additionally, the UNI Nu-4109 STA Dual Air Filter features an oiled paper element that allows for easy installation and maintenance. The oil coating on the filter element aids in sealing the filter against the intake manifold, creating a tight seal and ensuring optimal engine performance.

The UNI Nu-4109 STA Dual Air Filter is an excellent upgrade for your Honda Fourtrax 250x, offering improved engine protection, enhanced filtration, and increased performance. With its precise fit and exceptional quality, this air filter ensures a seamless installation process and will provide long-lasting, reliable service for your ATV.

The UNI-Filter Nu-4109 STA dual air filter is a potential upgrade option for Honda Fourtrax 250x models from 1987 to 1992 (trx250x). This filter boasts several advantages that might make it an attractive choice for off-road enthusiasts. Below are the pros and cons of this filter:

1. Enhanced engine protection: The dual-layered design of the UNI-Filter Nu-4109 STA keeps out larger particles, ensuring better engine protection against dust and debris.

2. Improved filtration efficiency: The filter's pleated design and fine filtration media increase the overall filtration efficiency, ensuring cleaner air enters the engine.

3. Longer service intervals: By providing better filtration, the UNI-Filter Nu-4109 STA can help extend the service intervals between filter replacements, saving time and money.

4. OEM-style design: The UNI-Filter Nu-4109 STA maintains the original OEM filter housing, making installation straightforward and hassle-free.

1. Potentially higher cost: Compared to the stock filter, the UNI-Filter Nu-4109 STA may be more expensive, which could be a deterrent for some buyers.

2. Potential power loss: Since the UNI-Filter Nu-4109 STA provides better filtration, there could be a slight loss in power due to the increased airflow resistance. However, this is generally a minimal concern for most users.

3. Additional maintenance: Although the filter may require fewer replacements, the potential for increased maintenance due to the finer filtration media should be considered.

The UNI-Filter Nu-4109 STA dual air filter offers several advantages for Honda Fourtrax 250x owners, including enhanced engine protection, improved filtration efficiency, and longer service intervals. However, it may come with a higher cost, potential power loss, and additional maintenance. Ultimately, the decision to purchase this filter depends on the individual's priorities, budget, and riding conditions. If engine protection and filtration efficiency are top priorities, the UNI-Filter Nu-4109 STA is an excellent choice. If budget and maintenance are primary concerns, the stock filter may be a better option.

part # nu4109sta price

• $29.95

specifications filterblank:

• for models: 250x, Trx250x, Fourtrax
• for makes: Honda
• for years: 1987-1992
• brand: Uni
• part type: Filter
• manufacturer part number: NU-4109STA
• country of origin: Usa

returns filterblank:

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

offer filterblank:

• availability: In Stock
• started: March 17, 2026
• quantity: 4
• options: Ship-to-home
• sold: 0

seller filterblank:

• rating: 99.8%
• # reviews: 411069

shipping filterblank:

• type: Fixed
• transit: 2-6 Days
• service: Standard
• class: Standard
• cost: $0.00

payments filterblank:

• credit card: Visa
• other
• wallet: Apple-pay

general filterblank:

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

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