General description Air Filter Cleaner 21702999 is a high filtration efficiency accessory designed for Volvo Penta D4, D6, D9, and D11 engines. This air filter effectively improves airflow, increases engine efficiency during operation, and provides clean filtered air. It prevents harmful dust and debris from entering internal engine components, thereby extending engine life. The filter is easy to install, requiring no complicated tools, as it directly replaces old or damaged air filters. Technical specifications Item Type: Air Filter Material: Filter Paper Length: Approx. 300mm / 11.8in Width: Approx. 240mm / 9.4in Thickness: Approx. 35mm / 1.4in Reference Part Numbers: 3818541, 3583654, 21702999 Replacement for Crom Marine: 117303 Replacement for Orbitrade: ORB17999 / 17999 Color: White Compatibility and accessories Compatible with D4, D6, D9, and D11 engines Replacement for various models including D4-180I-B, D4-210A-A, D6-310I-E, D9-500 (R4), and many more Installation Simple