Twin Air Pre Oiled Air Filter Honda CRF250-CRF450R(X) (2025) | 150233X nofit Eliminates the 9800 rpm rev

Eliminates the 9800 rpm rev limiter and provides a hotter advance curve

This Rev Box also fits the Honda Z50R with electronic ignition (1988-1999)

Large main compartment is ventilated on both sides

back and front Hyper flow panels for enhanced airflow

Twin Air Pre Oiled Air Filter Honda CRF250-CRF450R(X) (2025) | 150233X nofit Eliminates the 9800 rpm revTwin Air's Original Dual Stage patented design, high quality materials and superior construction deliver unbeatable performance and protection. Twin Air Filters are the hands down choice of more World and National Champions than all other filters combined. Features: Each twin air filter is pre oiled with twin air biodegradable foam filter oil, developed exclusively for twin air by chevron Texaco. Independently tested by the most prestigious