28130-7W100 (primary level) and 28130-7W101 (safety level) are the cellular air filter kits suitable for modern (Hyundai) trucks such as Xcient. They usually correspond to Donaldson P640571/P644637. They use cellular filter media and have a ISO 5011 filtration efficiency of 99.9%. They are OE-level replacement parts for commercial vehicles and are suitable for heavy-duty working conditions.
