Uni Filter NU-4127ST Multi-Stage Competition Air Filter Honda ATV

The Uni Filter NU-4127ST is a high-performance multi-stage competition air filter designed specifically for Honda ATVs. This premium foam air filter delivers superior filtration and airflow compared to paper filters, making it ideal for demanding off-road conditions and competitive riding.

Multi-Stage Filtration Technology:

Uni Filter's advanced open-cell polyurethane foam design works by suspending specially formulated filter oil throughout the web-like cell structure. As air passes through the filter, dirt particles are trapped by the sticky oil coating on the foam strands. Unlike paper filters that load on the surface, the multi-stage design utilizes the entire thickness of the foam—as outer strands capture larger particles, inner layers continue trapping finer dirt. This progressive filtration prevents surface loading and maintains consistent airflow for up to 80% of the filter's service life.

Key Features:

• Open-cell polyurethane foam construction for maximum dirt-holding capacity
• Multi-stage filtration prevents surface loading and air restriction
• Washable and reusable—simply clean, re-oil, and reinstall
• Competition-grade performance for aggressive riding conditions
• Direct replacement for Honda ATV applications
• Superior airflow compared to stock paper filters

This filter can be easily maintained by washing with Uni Filter cleaning solution, allowing the foam to dry completely, then re-oiling with Uni Filter oil. With proper care, this filter will provide thousands of miles of reliable engine protection while reducing waste from disposable filters.