UNI Filter Multi-Stage Competition Foam Air Filter - NU-4141ST | Honda CRF150R & CRF150RB Expert

Keep your engine breathing clean and producing maximum horsepower with the UNI Filter Multi-Stage Competition Air Filter (NU-4141ST). Renowned as a top choice for off-road racing teams, UNI filters are engineered to deliver unsurpassed airflow, superior dirt-stopping capabilities, and long-lasting dependability.

Unlike standard filters, UNI’s unique two-stage design features separate foam layers that come apart, making it incredibly easy to service, clean, and reuse. Built with an exact OEM-fit profile, it drops directly into your factory air box with no modifications required.

Features

• Advanced Dual-Layer Protection: The large-pore outer pre-filter captures large dirt particles and mud, while the small-pore inner filter stops microscopic grit from reaching your cylinder.

• Ultra-Seal Grease Groove: Features a specialized sealing surface edge that blocks dirt and debris from slipping past the filter base.

• Fully Serviceable & Reusable: Cleans easily using basic grease-cutting dishwashing detergent or foam filter cleaner—just wash, re-oil, and reuse.

• Maximum Flow & Power: Designed to optimize airflow volume, increasing torque and horsepower over standard stock restrictive paper filters.

• Proudly Made in the USA.

**📦 We ship to the lower 48 states.