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Hydrocarbon Dosing Module Compatible with Volvo & Mack Trucks D11 D13 D16 Trucks AHI Dosing Module Replace 21534115, 21870667, 22452551 【Safety Guaranteed】: 23185531 Hydrocarbon metering module provides accurate metering of hydrocarbons for optimal engine performance and emissions control. It also helps ensure your vehicle complies with emissions regulations. 【Compatible Models】: This hydrocarbon filling module is compatible with a range of heavy-duty trucks, including: Volvo D11, D13 and D16 engines and Mack MP8 trucks. Direct replacement part numbers such as 21534115, 23185531, 21870667 and 22452551 ensure they are as valid as the original equipment. 【Durable Construction】: This module features durable materials...