Dirt Bike Air Filters For 17-19 CRF ModelModel Fitment Honda CRF 250 R (2018 2019) Honda CRF 450 R (2017 2019) Honda CRF 450 RX (2017 2019) The nibbi off road air filter is made of polyurethane foam with many conical shapes cut into its surface to maximize the outer surface area, which is double the outer surface area of a normal filter. Greater chance of trapping dust, sand and dirt ensures that optimal airflow is maintained, thus maximizing engine performance and reliability. Features

High power ignition coil

000 miles of lifespan under normal driving conditions

Size: 48mm-37mm

Spigot: 26mm ID

3 x Gaskets

Large-size frame and widen field of view

Beta RR 390 4T (2020-2024)

Excellent responsiveness

Main Jet: #132 #135 #138 #140 #142 #145 #148 #150

The nibbi dual layer clamp-on air filter consists of "two layers" of foam

Suitable for motocross bikes with 7/8 inch (22mm) handlebars

Engineered Compatibility — Perfect fit for Zongshen NC series engines