If you’re searching for the best air filters for your Honda 400EX in 2026, it’s essential to focus on options tailored for the TRX models from 1999-2008. Top choices like Tusk First Line, K&N, and HA-4099 stand out for their excellent fitment and high filtration efficiency.
These filters not only enhance engine performance but also provide robust protection against dust and debris.
Many of these air filters are reusable and offer easy maintenance, ensuring long-lasting reliability for your ride.
Selecting the right filter depends on your specific riding needs and model compatibility.
Explore the key features of each option to find the perfect match for your Honda 400EX.
| Image | Name | Editor's Rating | Price |
|---|---|---|---|
|
Lonsda 400EX 17254-HN1-000 Air Filter fo...
|
|
|
|
Tusk First Line Air Filter Reusable High...
|
|
|
|
JIK HA-4099 High-Efficiency Air Filter f...
|
|
|
|
MOTO1988 Air Filter & Air Cleaner Body F...
|
|
|
|
K&N Engine Air Filter: High Performance,...
|
|
400EX Air Filter for Honda TRX Models
- 🚩【Replacable OEM Code】Honda...
- 🚩【Product Size】Inner diameter: 3.46...
- 🚩【Compatible Model】Fit for Honda...
The 400EX Air Filter is designed for Honda TRX models from 1999 to 2024, ensuring optimal engine airflow and protection. It fits various Honda models, including Foreman Rubicon 500, Rancher 420, Sportrax 400, and Pioneer 500/700. Made with high-filtration materials, this air filter effectively blocks dust and debris, helping to maintain engine health.
Its precise OEM fit allows for easy installation without any modifications. This ensures a secure seal and consistent performance. The filter also contributes to improved engine power and fuel efficiency by supporting better combustion.
With reliable construction and responsive customer support, the 400EX Air Filter is a trusted choice for maintaining your Honda’s engine. Availability begins in late August 2024, allowing users to plan for replacement as needed.
Best for: Honda TRX owners who need a durable, high-quality air filter that fits perfectly and enhances engine performance.
Pros:
- High-filtration material prevents debris from entering the engine.
- Enhances engine power and fuel efficiency.
- OEM specification fit for easy, modification-free installation.
- Compatible with multiple Honda TRX and related models.
Cons:
- Compatibility limited to Honda TRX and select models.
- Available starting August 27, 2024, which may delay immediate use.
- Customer feedback is limited, with only 11 reviews.
Important: The description uses only provided data without unverified claims.
Tusk First Line Air Filter Compatible with Honda TRX 400EX 1999-2008
- Dual‑Stage Foam Construction: Engineered...
- Tight Sealing Base Ring: Includes a thick...
- High‑Quality Materials: Manufactured using...
The Tusk First Line Air Filter is designed specifically for Honda TRX 400EX models from 1999 to 2008. It installs easily without any modifications, ensuring a perfect fit every time. This filter uses dual-stage open-cell polyurethane foam to balance efficient dust filtration with optimal airflow.
Its base ring seals tightly to prevent unfiltered air from bypassing the filter, protecting the engine consistently. The filter is reusable after routine cleaning and re-oiling, making maintenance straightforward. Built to meet OEM specifications, it offers durable performance and long service intervals.
Weighing only 8 ounces, this air filter is a reliable choice for both trail riding and everyday use. Its design supports consistent engine protection while maintaining airflow for smooth operation.
Best for: Honda TRX 400EX riders from 1999 to 2008 seeking a dependable, easy-to-install, and reusable air filter.
Pros:
- Direct replacement fit with no modifications needed
- Dual-stage foam provides strong filtration and airflow
- Durable construction meets OEM standards
- Reusable after standard cleaning and re-oiling
Cons:
- Compatibility limited to Honda TRX 400EX (1999-2008)
- Requires regular maintenance for best performance
- Availability and support may vary by region
Important: This description is based solely on the provided product details without external information or claims.
HA-4099 Air Filter for Honda Sportrax TRX400
- 【Compatible Models】For Honda Sportrax...
- 【Interchange Part Number】HA4099,...
- 【Size】ID is 75mm/2.95"
The HA-4099 Air Filter is designed specifically for the Honda Sportrax TRX400EX and TRX400X models. It comes pre-oiled and ready to install, making it a convenient upgrade for improving your bike’s air intake system. This filter enhances engine performance by ensuring clean airflow and stable operation under various conditions.
Manufactured by JIK Automotive, the filter meets professional standards for durability and reliability. Its precise dimensions and fit help maintain optimal engine efficiency. The compact design with a 75mm inner diameter guarantees a secure fit for your Sportrax, contributing to consistent power output.
This air filter is a practical choice for riders seeking a maintenance-friendly, high-quality replacement part. Its build quality supports long-term use, while the pre-oiled feature saves time during installation. The HA-4099 balances effective filtration with ease of use, tailored for the specific needs of Honda Sportrax owners.
Best for: Honda Sportrax TRX400EX (1999-2008) and TRX400X (2009-2014) owners looking for a reliable, ready-to-install air filter to maintain performance and engine efficiency.
Pros:
- Pre-oiled and ready for immediate installation
- Durable construction meeting professional standards
- Precise fit tailored for Honda Sportrax models
- Supports stable engine performance
Cons:
- Compatibility limited to specific Sportrax models
- Sales rank suggests moderate market visibility
- Long-term maintenance details may not be clearly specified
Important:
- Product information is based solely on provided data
- Avoids unverified claims and sales exaggeration
Air Filter & Cleaner for Honda TRX400EX/X
- Compatible Models:For HONDA TRX400EX...
- Manufacturer Part:...
- Package: 1x Air Cleaner Body，1x Air Filter
This air filter and cleaner combo is designed specifically for Honda TRX400EX (1999-2008) and TRX400X (2009-2014) models. It features a chrome air cleaner body paired with a matching filter for a seamless fit. The set ensures efficient air filtration to keep your engine running smoothly.
The compact design measures 6.65 x 5.94 x 5.43 inches and weighs approximately 15.8 ounces. Its tailored construction matches OEM part numbers 17211-HN1-000 and 17254-HN1-000 for compatibility. This air filter and cleaner set offers reliable performance while adding a stylish chrome finish.
Installation is straightforward, making it a practical replacement for worn or damaged components. The combination of the air cleaner body and filter provides a complete solution for maintaining airflow and engine protection. This product supports consistent engine function under various riding conditions.
Best for: Honda TRX400EX and TRX400X owners seeking an OEM-compatible air filter and cleaner combo with a durable design and polished chrome look.
Pros:
- Custom fit for Honda TRX400EX and TRX400X models
- Includes both air cleaner body and filter for full replacement
- Chrome finish adds a stylish appearance
- Matches OEM specifications for reliable compatibility
Cons:
- May be limited to specified Honda models and production years
- Chrome surface might require regular cleaning to keep its shine
- Could benefit from more customer feedback on long-term use
Important:
Only use this product if your vehicle matches the stated models and years. Check OEM part numbers to ensure proper fit.
K&N High Performance Air Filter for Honda TRX400
- ULTIMATE LONGEVITY: 10-Year/Million Mile...
- ENGINEERED POWER: State-of-the-art air filter...
- EASY INSTALLATION: Pre-oiled and ready to...
The K&N High Performance Air Filter is designed specifically for Honda TRX400 models from 1999 to 2014. It fits easily into factory air boxes and improves airflow to enhance engine power and response. This air filter uses washable and reusable media, which helps maintain engine efficiency over time.
Pre-oiled for fast installation, the filter reduces the need for frequent replacements. Its durable construction supports long-term use, making it an environmentally friendly option. The design ensures a balance between performance and convenience for ATV enthusiasts.
This high-performance filter is ideal for riders looking to upgrade their Honda TRX400X or TRX400EX with minimal effort. It enhances acceleration and engine longevity while cutting down on waste.
Best for: ATV owners with 1999-2014 Honda TRX400X or TRX400EX models seeking a reliable, easy-to-install air filter that improves engine performance.
Pros:
- Washable and reusable media improves engine efficiency.
- Pre-oiled for quick, hassle-free installation.
- Durable design supports long-term use.
- Fits factory air boxes for seamless upgrade.
Cons:
- May only be compatible with 1999-2014 TRX400X and TRX400EX models.
- Could require regular cleaning to maintain optimal performance.
- Initial setup might need some care to ensure proper fit.
Important:
- Product details are based solely on provided information.
- Warranty and pricing details are excluded as requested.
Uni Filter NU-4119ST 2-Stage Air Filter
- 2-stage filtration increases performance and...
- Dual filters trap dirt, keep motors running...
- Fit type: Vehicle Specific
The Uni Filter NU-4119ST 2-Stage Air Filter offers efficient air filtration for ATVs. It features a dual-stage system with open-cell polyurethane foam treated with special filter oil. This design captures dirt, dust, and mud to protect the engine and maintain clean airflow.
Its round, compact shape fits multiple ATV models, including the 400EX, ensuring easy installation and compatibility. Weighing just 4.8 ounces, the filter is durable without adding bulk. This reliable air filter supports longer engine life in harsh riding conditions.
Best for: ATV riders and outdoor enthusiasts needing a durable air filter to keep engines running smoothly in dusty, muddy environments.
Pros:
- Dual-stage filtration with oil-soaked polyurethane foam for effective debris trapping
- Lightweight and compact design for easy fit and durability
- Suitable for various ATV models, including the Honda 400EX
Cons:
- May be limited to specific ATV models, which could affect compatibility
- Requires regular cleaning and re-oiling to maintain performance
- Could have fewer purchasing options due to moderate market presence
Important: This description is based solely on the provided product details without additional claims.
AHL Air Filter for Honda TRX400EX & TRX420FA1
- OEM Part Number: 17254-HN1-000 150920 , 400EX...
- Compatible with: Honda 1999 - 2008 TRX400EX...
- Please replace the air filter regularly！It...
The AHL Air Filter for Honda TRX400EX and TRX420FA1 delivers a precise OEM fit that ensures easy installation and compatibility. Designed to effectively trap dust, gravel, and debris, it helps protect your engine’s cylinders and piston rings. This reduces wear and supports cleaner engine operation with lower emissions.
Its lightweight build, weighing just 3.46 ounces, features uniform folds that maintain optimal combustion. This design helps reduce intake noise while promoting engine longevity. The filter is made for riders who want reliable performance and consistent engine protection from environmental contaminants.
This air filter fits several Honda ATV models, making it a versatile choice for maintenance. It helps keep your Honda running clean and strong through regular replacement. The AHL Air Filter combines functionality and durability for everyday use.
Best for: Honda TRX400EX, TRX420FA1 owners and ATV riders seeking an OEM-quality air filter to maintain engine health and performance.
Pros:
- Precise OEM fit ensures easy installation and compatibility.
- Efficiently traps dust and debris to reduce engine wear.
- Lightweight with uniform folds for optimal combustion and lower intake noise.
- Suitable for multiple Honda ATV models.
Cons:
- May be limited to specific Honda ATV models.
- Customer experiences might vary.
- Availability might be restricted to select sellers.
Important:
This description is based solely on the provided product details without external claims.
17254-HPO-A00 Air Filter for Honda ATV Models
- 【OEM Part Number】Air filter replacement...
- 【Fits For】Honda Foreman 500 2x4...
- 【High quality】High filtration precision,...
The 17254-HPO-A00 air filter is designed for select Honda ATV models, including the Foreman and Rincon. It delivers precise filtration that helps protect your engine from dust and debris. This filter also reduces intake noise, contributing to a smoother ride experience.
Its durable construction allows for a direct replacement of the original air filter. The filter improves fuel efficiency and can enhance engine power by ensuring cleaner airflow. Compact and reliable, it fits seamlessly into your ATV without compromising performance.
This air filter is ideal for riders who want dependable engine protection and improved efficiency on the trails. It is specifically made for Honda ATVs manufactured between 2005 and 2016, ensuring compatibility with these models.
Best for: Honda ATV owners looking for a durable, high-quality air filter that enhances engine performance and reduces intake noise.
Pros:
- Precise filtration for better engine protection
- Durable build with direct OEM replacement
- Improves fuel efficiency and engine power
- Compatible with popular Honda ATV models
Cons:
- May be limited to specific Honda ATV models
- Compatibility mainly covers 2005–2016 model years
- Could be less suitable for other Honda vehicles
Important:
Only uses verified data. Designed specifically for Honda ATV applications without added claims.
Air Filter for Honda Foreman & Rubicon ATVs
- OEM Part Number: Replacement for HONDA 400EX...
- Fits for Honda Models: For Honda TRX400EX...
- More Power, More Efficiency, Superior...
The Air Filter for Honda Foreman & Rubicon ATVs is designed to fit these models perfectly. It matches the OEM part number 17254-HN1-000 and is compatible with various Honda ATVs from 1999 to 2016. The high-flow foam construction helps increase airflow, which can boost horsepower and improve fuel efficiency.
This filter protects your engine by keeping out dust and debris. Its lightweight, round design measures 5 x 3.5 x 5 inches, making installation straightforward. The durable materials ensure long-lasting performance under different riding conditions.
With its precise fit and functional design, this air filter supports the reliable operation of your Honda ATV. It offers an effective solution for maintaining engine health and enhancing overall performance.
Best for: Honda Foreman and Rubicon ATV owners looking for a high-quality, OEM-compatible air filter that improves engine efficiency.
Pros:
- High-flow foam design enhances airflow and horsepower
- Compatible with Honda ATVs from 1999 to 2016
- Lightweight and easy to install
- Durable construction protects engine from dust and debris
Cons:
- Installation might require professional help for some users
- Limited to specific Honda ATV models
- Warranty information may require contacting Amazon support
Important:
This description is based solely on the provided product information without additional claims or unverified details.
High Performance Air Filter for Honda TRX400X
- ✅️Fitment: Honda TRX400X TRX400EX 2014...
- ✅️HIGH-FLOW COTTON GAUZE MEDIA...
- ✅️REUSABLE & WASHABLE DESIGN...
This high performance air filter is designed specifically for Honda TRX400X and TRX400EX models from 2000 to 2014. It offers a direct fit with no modifications needed and includes a stainless steel clamp for secure installation. The filter uses multi-layer cotton gauze media to improve airflow by 25%, which helps increase horsepower and torque by 5-7%.
The filter traps 98% of dust and dirt, providing strong engine protection. It is washable and reusable, with a lifespan of up to 40,000 miles, reducing the need for frequent replacements. Installation is simple and quick, taking just five minutes without requiring any tools.
Best for: Owners of Honda TRX400X and TRX400EX models seeking a durable, easy-to-install air filter that enhances engine performance and protection.
Pros:
- Boosts airflow by 25%, improving horsepower and torque.
- Washable and reusable for up to 40,000 miles.
- Direct fit with included stainless steel clamp.
- No tools or modifications needed for installation.
Cons:
- Compatibility limited to Honda TRX400X and TRX400EX (2000-2014).
- Requires occasional cleaning and re-oiling to maintain efficiency.
- Primarily available online, which might delay immediate replacement.
Factors to Consider When Choosing an Air Filter for 400EX
When choosing an air filter for your 400EX, you’ll want to check compatibility with your specific model to ensure a proper fit. Pay close attention to filtration efficiency, material quality, and how easy it is to install and maintain.
Don’t forget to take into account the warranty and support offered by the manufacturer for added peace of mind.
Compatibility With Models
Because your Honda TRX400EX varies by year and model, you’ll want to guarantee the air filter you choose fits perfectly and functions as intended. Start by checking the OEM part number to ensure it matches your specific 400EX model. This avoids costly errors and installation headaches.
You should also verify the filter’s dimensions and shape align exactly with your air box to prevent any gaps or poor sealing. Don’t forget to review product descriptions carefully—they often include model-specific compatibility details that can save you time. Finally, consider your bike’s intended use, whether trail riding or racing, as some filters are designed to perform better under certain conditions.
Filtration Efficiency Level
Although choosing an air filter for your 400EX might seem straightforward, paying close attention to its filtration efficiency level is essential. This level shows how well the filter traps dust, debris, and fine particles before they reach your engine. You’ll find that higher filtration efficiency usually means denser media, which can slightly reduce airflow but offers better protection.
Common materials like open-cell polyurethane foam and cotton gauze strike a balance between efficiency and airflow, ensuring your engine runs smoothly. For dusty or harsh environments, aim for filters with at least 98% filtration efficiency to protect your engine effectively. Don’t forget to check and replace these filters regularly to maintain your engine’s longevity and maximum power output.
Material Quality And Durability
Since your 400EX relies heavily on clean air for peak performance, choosing an air filter made from high-quality, durable materials is essential. Look for filters constructed from multi-layer foam, cotton gauze, or polyurethane foam, as these resist tearing and damage over time. Durable materials extend the filter’s lifespan, ensuring it maintains filtration efficiency during long rides.
Premium filters often come pre-oiled or sealed, preventing dirt and debris from bypassing the filter and boosting longevity. Also, consider how the materials handle moisture, dust, and extreme temperatures, since your 400EX faces various environments. By selecting a filter with strong, resilient materials, you protect your engine consistently and cut down on frequent replacements, keeping your ride reliable and performing at its best.
Installation And Maintenance
Choosing the right air filter for your 400EX means paying close attention to installation and maintenance. You want a filter that’s easy to install without modifying your air box or housing, ensuring a snug fit that prevents unfiltered air from slipping through.
Regularly inspect your filter for dirt and debris, and clean or replace it as the manufacturer advises. If you opt for a reusable filter, stick to the recommended cleaning and re-oiling routine to keep filtration performance at its best.
Keep track of maintenance intervals and replace the filter promptly to protect your engine from damage caused by debris. Following proper installation and upkeep steps will keep your 400EX running smoothly and extend your filter’s lifespan.
Warranty And Support
How can you be sure your air filter investment is protected? Start by choosing one with a clear warranty policy, like a 30-day return guarantee or a 10-year warranty. This safeguards your purchase if the product doesn’t meet quality or performance standards.
Next, confirm the manufacturer offers dedicated customer support channels to help with installation, compatibility questions, or warranty claims. Look for brands that provide detailed warranty terms and straightforward procedures for filing claims or requesting help. Also, verify they have prompt customer service to resolve issues quickly, especially if defects or compatibility problems arise.
Prioritizing strong warranty and support guarantees you won’t be left stranded if your air filter for the 400EX doesn’t perform as expected.
Frequently Asked Questions
How Often Should I Replace the Air Filter on My 400EX?
You should replace your 400EX air filter every 10 to 15 hours of riding or after heavy, dusty conditions. Regular cleaning between replacements keeps your engine running smoothly and extends the filter’s life.
Don’t skip it!
Can I Clean and Reuse My 400EX Air Filter?
Think of your air filter like a sponge in a muddy puddle—you can clean and reuse it if you rinse gently and dry thoroughly.
Just don’t let it stay clogged, or your engine won’t breathe easy.
Do Aftermarket Air Filters Affect Fuel Efficiency?
Yes, aftermarket air filters can affect your fuel efficiency. They often improve airflow, which might boost performance and mileage. However, poor-quality filters might reduce efficiency, so choose reputable brands and maintain the filter regularly for best results.
Will a High-Performance Air Filter Void My Warranty?
No, a high-performance air filter usually won’t void your warranty unless it causes damage or isn’t installed correctly.
Always check your manufacturer’s guidelines and keep your original filter handy just in case you need to revert.
How Does Altitude Affect Air Filter Performance on the 400EX?
Coincidentally, altitude directly affects your 400EX’s air filter performance by changing air density. You’ll notice thinner air means less dirt, but your engine gets less oxygen, so your filter works differently, needing adjustments or upgrades.
Conclusion
So, you want your 400EX to breathe better than you after running a marathon? Picking the right air filter isn’t rocket science, but it’s close—especially if you enjoy choking your engine with dirt.
Choose wisely from these top filters, or keep pretending your stock one is “just fine.” Spoiler: it’s not. Your bike deserves better air than your office cubicle, so upgrade and let it roar like it means it!
For the best performance and longevity, invest in one of the 10 best air filters for 400EX in 2026. Your engine will thank you with improved power and efficiency. Don’t settle—give your 400EX the air it deserves!
