## Prox Air Filter Insert Foam (HFF4022) Yamaha YFZ 450 04-13, YFZ 450R '09-'20 The Prox air filter insert foam (HFF4022) is a high-quality replacement designed for Yamaha YFZ 450 (2004-2013) and YFZ 450R (2009-2020) quads. It provides optimal engine protection against dirt, dust, and debris, ensuring its long life and trouble-free operation. Made of durable and long-lasting foam, the Prox filter is characterized by excellent filtration while allowing free airflow, which translates into better performance. ### Benefits of the Prox Filter: * **Excellent Filtration:** Effectively traps contaminants, protecting the engine from damage. * **High Airflow:** Ensures optimal air supply to the engine, impacting its power and efficiency. * **Durability and Resistance:** Made of robust foam, resistant to wear and tear and mechanical damage. * **Easy Installation:** Hassle-free installation in the quad, perfectly matched to dedicated Yamaha models. * **Prox Brand:** A guarantee of quality and reliability, Prox is a renowned manufacturer of aftermarket parts for motorcycles and quads. Replacing the air filter is a key element of regular quad maintenance. The Prox filter (HFF4022) is an ideal choice for those looking for a high-quality replacement that will provide optimal engine protection and contribute to its trouble-free operation for a long time.