RED SPONGE Sponges for original filters Filter elements with increased air flow, self-extinguishing expanded polyurethane with large filtering capacity designed for sports applications. Red Sponge, the si immediately recognizes the characteristic red color Malossi and the brand printed in yellow. Features: - Increased thickness with calculated porosity. - They provide excellent dry filtering characteristics, which can be further increased by ing them with Malossi. - Selected material, produced exclusively for specific use. Perfectly interchangeable to the originals they are particularly suitable for ad high performance engines.