Uni Filter NU-4099ST Multi-Stage Competition Air Filter

The Uni Filter NU-4099ST is a high-performance, multi-stage competition air filter engineered for maximum airflow and superior engine protection. Designed as a direct replacement for OEM filters, it fits perfectly in your factory airbox without modification.

Key Features:

• Two-stage filtration system provides enhanced dirt-trapping capability while maintaining optimal airflow
• Dual-layer foam construction captures fine particles in the outer stage while the inner stage blocks larger contaminants
• Completely washable and reusable—saves money over disposable paper filters
• Designed for direct fitment in factory airbox for easy installation
• Unique two-stage design allows for thorough cleaning and extended service life
• Ideal for severe riding conditions including mud, sand, and dusty environments

Uni Filter's proprietary foam technology delivers competition-level performance while protecting your engine from harmful dirt and debris. The washable design means you can clean and re-oil the filter multiple times, making it an economical and environmentally friendly choice for serious riders and racers.