12 0 Cummins Decomposition Reactor with Doser Injector 4377370 for ISF/ QSF 3.8L TIER 4 $799.99 USD (GOOD USED) Cummins OEM Decomposition Reactor with Doser Injector, for sale!!!! Decomposition Reactor Cummins Part #: 4377370; Other Part #: A050H583; Doser Injector Cummins Part #: 5305254,... ConditionUsedFits To Make(s)CumminsFits To Model(s)ISF/ QSF 3.8L TIER 4Part Number4377370Stock NumberDPF1005 MLS Number13492495CategoryMisc. Equipment Parts Last Updated4/2/2025 LocationHialeah, FL, US Sold ByJJ Rebuilders Inc. (844) 385-___ SHOWNUMBERCall Seller Email Seller Save More Info