{"product_id":"5418481-genuine-cummins®-inlet-catalyst-module","title":"5418481 | Genuine Cummins® Inlet Catalyst Module","description":"\u003cp\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e Inlet Catalyst Module\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: New\u003cbr\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Cummins®  \u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cb id=\"docs-internal-guid-45479c87-7fff-9123-effe-965214eaba13\"\u003e\u003cspan\u003ePart Number:\u003c\/span\u003e\u003c\/b\u003e 5418481\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003e1. Compatible Engines \u0026amp; Emissions Systems\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003ePart number \u003cb\u003e5418481\u003c\/b\u003e is designed for Cummins® medium-duty diesel engines equipped with Single Module™ or modular Aftertreatment Systems (EPA 2017 \/ Euro 6 \/ Stage V standards):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCummins® Engine Platforms:\u003c\/b\u003e B6.7, ISB6.7, L9, and ISL9 CM2350 \/ CM2450 series engines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eEmissions Standard:\u003c\/b\u003e EPA 2017+ emissions compliant aftertreatment configurations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e2. Vehicle \u0026amp; Equipment Fitment\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eMedium \u0026amp; Heavy-Duty Trucks:\u003c\/b\u003e Freightliner® (M2 106, 108SD), International®\/Navistar® (MV Series, HV Series), Ford® (F-650, F-750 with 6.7L Cummins), and Peterbilt® \/ Kenworth® medium-duty trucks (Models 337, 348, T270, T370).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBuses \u0026amp; Transit:\u003c\/b\u003e Blue Bird®, Thomas Built Buses®, and IC Bus® school and commercial transit vehicles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eVocational \u0026amp; Specialty Equipment:\u003c\/b\u003e Fire apparatus, refuse trucks, dump trucks, and sweeper platforms powered by Cummins B6.7 or L9.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe \u003cb\u003eInlet Catalyst Module\u003c\/b\u003e is an upstream flow-mixing and catalytic pre-treatment component of the single-module exhaust aftertreatment system on Cummins® B6.7 and L9 diesel engines.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003e1. What is it?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003ePart is the inlet section of the Selective Catalytic Reduction (SCR) and Diesel Particulate Filter (DPF) assembly. Located directly downstream of the engine turbocharger exhaust pipe, it houses the Diesel Oxidation Catalyst (DOC) or primary decomposition chamber where Diesel Exhaust Fluid (DEF\/AdBlue®) is injected, atomized, and thoroughly mixed with hot exhaust gases.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2. Core Functions \u0026amp; Technical Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eHydrocarbon Oxidation \u0026amp; NO-to-NO₂ Conversion:\u003c\/b\u003e Utilizes a precious-metal-coated ceramic honeycombed substrate to oxidize unburned hydrocarbons (HC) and carbon monoxide (CO), converting NO to NO₂ to facilitate passive DPF regeneration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eExhaust Flow Uniformity \u0026amp; Heat Distribution:\u003c\/b\u003e Features internally tuned flow-diffusers that evenly distribute raw exhaust gas and heat across the full face of the downstream filter substrate, preventing localized hot spots.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eIntegrated DEF Dosing \u0026amp; Mixing Port:\u003c\/b\u003e Includes dedicated mounting bosses for the DEF injector nozzle and internal mixer blades designed to fully vaporize urea into ammonia (NH₃) without forming harmful crystalline deposits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eHeavy-Gauge Stainless Steel Housing:\u003c\/b\u003e Built with high-grade, heat-corrosion-resistant stainless steel to endure severe thermal cycling and road vibration in commercial service.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns of Faulty\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003e1. Active Aftertreatment Check Engine Lights \u0026amp; Fault Codes\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe Engine Control Module (ECM) triggers diagnostic trouble codes (DTCs) when it detects improper oxidation efficiency, high exhaust backpressure, or DEF dosing errors:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCommon Fault Codes:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003eSPN 3251 \/ FMI 0, 2\u003c\/code\u003e (DPF Differential Pressure - High \/ Erratic)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003eSPN 4364 \/ FMI 18\u003c\/code\u003e (SCR NOx Conversion Efficiency - Below Normal)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003eSPN 3058 \/ FMI 10, 18\u003c\/code\u003e (EGR System \/ Aftertreatment System Degradation)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003eSPN 3556 \/ FMI 18\u003c\/code\u003e (Aftertreatment Hydrocarbon Dosing \/ Fuel Injected into Exhaust Error)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e2. Frequent or Failed DPF Regenerations\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The truck attempts active DPF regeneration far more often than normal, or active regenerations fail to complete and log time-out errors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Degraded precious-metal coating inside the catalyst fails to oxidize hydrocarbons effectively, preventing the exhaust gas from reaching the high temperatures (1,000°F \/ 540°C+) required to burn off soot in the DPF.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e3. Excessive Crystallized DEF \/ Urea Deposit Buildup\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e White, chalky crystalline buildup clogs the mixer section or coats the inlet face of the catalyst, restricting exhaust flow.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Internal flow-diffuser damage or failed mixing geometry preventing the injected DEF from fully atomizing and vaporizing into ammonia gas (NH₃).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e4. Loss of Engine Power \u0026amp; Low Turbo Boost (High Backpressure)\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The engine feels sluggish under load, fuel economy drops, or the ECM forces an engine power de-rate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Melted, face-plugged, or cracked ceramic substrates block the exhaust passage, causing excessive exhaust backpressure that chokes the turbocharger.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManuacturer information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCummins\u003c\/strong\u003e® is an American corporation that specializes in the production of engines, generators, filters and related technologies for automobiles, ships, construction and other industries. Founded in 1919, the company is widely known for its innovations in diesel engines and hybrid technologies. Cummins is also actively working on the development of alternative energy sources such as electricity and hydrogen. Its products are sold worldwide, serving a variety of industries and transportation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarrantly\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFirst Truck Parts offers\u003cstrong\u003e 365-days warranty \u003c\/strong\u003efor all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website\u003c\/p\u003e","brand":"Cummins®","offers":[{"title":"Default Title","offer_id":49414229426420,"sku":"5418481","price":2999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/photo_2026-09-16_18-39-36.jpg?v=1789574418","url":"https:\/\/firsttruckparts.com\/products\/5418481-genuine-cummins%c2%ae-inlet-catalyst-module","provider":"First Truck Parts","version":"1.0","type":"link"}