CRT are pleased to offer the latest K&N performance air filter which has shown to have the same flow rate as much more expensive systems whilst providing the utmost filtration thanks to the pleated multi-layer construction.
This replacement filter element can simply replace the stock paper filter in the original Reiju 307 Adventura air-box for an instant airflow performance boost.
These K&N Performance Filters come ready oiled and ready to fit into the standard air-box and can be cleaned, re-oiled time and time again to save costs whilst providing the maximum filtration thanks to its 4 layer cotton construction.
They will save you money by cutting down on maintenance cost over the stock throw away paper element. It also benefits from a fantastic lifetime warranty as long as manufacturers service recommendations are adhered to.
- Designed to provide increased horsepower and torque
- Pleated media provides a large filtration area offering long service intervals
- Multiple layers of woven cotton gauze media offers excellent filtration
- Application specific base seal and sealing bead
- Made in the USA for over 40 years
- Washable & reusable, pre-oiled and ready to ride!
- No-Hassle Lifetime Limited Warranty
NOTE:
To fit all Reiju 307 Adventura models from 2025-on
As used in the official Reiju Performance Upgrade Kit


















