Uni Filter NU-2281ST Two-Stage Air Filter for Yamaha Dirt Bikes

The Uni Filter NU-2281ST is a high-performance two-stage air filter engineered for Yamaha dirt bikes, designed to deliver unsurpassed airflow, superior dirt-stopping capability, and exceptional overall performance. This replacement filter fits precisely in the factory air box exactly like the original equipment filter.

Key Features:

• Unique two-stage design with dual layers of foam that can be separated for maximum airflow and complete cleaning
• Each foam layer services independently, allowing thorough maintenance without compromise
• Thin Ultra Seal base with integrated "grease groove" on the sealing surface is virtually impossible to tear
• Drop-in replacement that fits stock air box without modification
• Easy maintenance—simply clean with grease-cutting dishwashing detergent, oil, and reuse indefinitely
• Trusted by factory Yamaha, Kawasaki, and Suzuki off-road racing teams
• Made in the U.S.A.

The NU-2281ST has earned its reputation as the best-selling replacement air filter for competition motorcycles and ATVs. Its innovative two-stage construction allows riders to service each foam layer separately, ensuring maximum cleaning effectiveness while maintaining optimal filtration and airflow characteristics for peak engine performance.