K&N Replacement Air Filter - Round 2 ID x 3.813in OD x 4in H for 21-23 Royal Enfield Bulle

The K&N RO-3522 is a high-flow air filter designed to provide more power and torque for motorcycles. It is washable, reusable, and pre-oiled, ready for installation. This filter fits directly into the OEM airbox with an application-specific sealing gasket for a precise fit and offers a large filtration surface for extended service intervals.

Made in the USA, the RO-3522 features pleated cotton gauze media, designed to improve performance and protect the engine for the lifetime of the vehicle. K&N guarantees its filters for 10 years or one million kilometers, recommending cleaning and re-oiling every 80,000 kilometers.