Profilter ITG foam air filter for original airbox, WB-427

Discover the Profilter foam air filter, specifically designed for original airboxes (part number WB-427). This high-performance replacement filter is handcrafted in England, using the same materials found in Formula 1 and WRC racing. Featuring a "TriFoam" design—composed of three layers of high-filtration foam—it effectively captures dust particles as small as 5 microns. It allows for better airflow compared to traditional cotton or paper filters, resulting in improved fuel economy at constant speeds and increased power output by reducing pressure drop. The filter is washable and reusable, with a lifespan of up to 10 years. It comes pre-oiled and ready for immediate use. For maintenance, we recommend using the cleaning kit (part number: CLK1).