Aftertreatment Fuel Injector / 7th Injector Kit | Volvo 21407621 | FleetRun FR-AFTR879

Part Number FleetRun: FR-AFTR879 Cross Reference Part Number Volvo: 21407621 / 22009269 / 21407772 Mack: 21407621KTP Misc. Industry Part Number: DI1001 Includes   1 ~ Injector / Doser 1 ~ Injector Mounting Gasket 2 ~ Cap Screw Overview Aftertreatment Fuel Injector / 7th Injector Kit for Volvo / Mack. Our kits are made with quality in mind, meeting or exceeding OEM standards. What Is An Aftertreatment Fuel Injector? An Aftertreatment Hydrocarbon Injector (AHI); otherwise known as a 7th injector or an Aftertreatment Fuel Injector plays a key role in an emissions compliant heavy duty trucks DPF regeneration process. Once the AHI receives a signal from the engines ECM it sprays diesel fuel accordingly into the exhaust stream therefore creating a major increase in exhaust temperature allowing the truck to complete the DPF regeneration. Common Issues Although the Aftertreatment Fuel Injector may work thoroughly to increase exhaust temperature, they have common issues of getting fa