Uni Filter NU-8517ST Two-Stage Foam Air Filter for Polaris ATVs

The Uni Filter NU-8517ST is a high-performance two-stage foam air filter designed specifically for Polaris ATV applications. This professional-grade filter utilizes Uni's proven dual-layer foam technology to provide superior engine protection in demanding off-road conditions.

Two-Stage Filtration System:

• Large-pore outer pre-filter layer captures bigger dirt particles and debris
• Small-pore inner filter layer traps fine dust and engine-damaging grit before it reaches the cylinder
• Dual-density foam construction maximizes airflow while ensuring comprehensive filtration

Key Features:

• Trusted by professional Kawasaki, Yamaha, and Suzuki off-road racing teams
• Washable and reusable design for long-term value
• Premium open-cell polyurethane foam construction
• Direct OEM replacement fitment for easy installation

Uni filters are engineered to outperform traditional paper filters in dusty, muddy, and extreme riding conditions. The foam material can be cleaned and re-oiled multiple times, making this an environmentally friendly and cost-effective filtration solution for serious ATV enthusiasts.