Honda TRX400EX Air Filter - K&N Engineering - Drop-In, Washable/Reusable, High-Flow - '99-'08. This direct-fit K&N replacement element is made for riders who want reliable, serviceable filtration that supports off-road use without complicated modifications.

Built as a drop-in replacement for '99 through '08 TRX400EX models, this K&N air filter offers high airflow while maintaining effective particle capture for dusty, off-road conditions. The multi-layer cotton media is washable and reusable, reducing waste and long-term filter costs. Because it fits the factory airbox, installation is straightforward and, in most cases, no carburetor jetting changes are required. The filter is designed to help preserve consistent carburetion at altitude and under extended riding conditions.

Features

• Direct-fit drop-in replacement for Honda TRX400EX ('99-'08)
• Washable and reusable cotton-gauze media
• High-flow design intended to support throttle response
• Durable construction for repeated service cycles
• Designed to maintain clean carburetion in dusty/off-road environments

This K&N element is a practical upgrade for enthusiasts who routinely ride in dirty or dusty terrain and want a serviceable filter that performs consistently. Installation is simple for anyone comfortable with basic airbox work, and the reusable design lowers the need for frequent replacements.

If you have questions or want help choosing the right part, call us directly: 512-982-9393 (TX) or 562-981-6800 (CA). We have locations in Austin, Texas and the Los Angeles, California area where we offer installation and customization services. If you’re considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov