4254210C91 | Genuine International® / Navistar® Diesel Exhaust Fluid (DEF) Header 25" for 10.6—32G

SKU: 4254210C91 MPN: 4254210C91

Turn DEF precision into a breeze using the Genuine International / Navistar DEF Header. Part number: 4254210C91. Condition: new. Integrates 40µ filtration, and coolant-heated connections for consistent urea management.

$479.00
No Core Charge
3 in stock

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Product Description

Product Name Diesel Exhaust Fluid (DEF) Header Product Name Diesel Exhaust Fluid (DEF) Header
Condition New Condition New
Brand International® / Navistar® Brand International® / Navistar®
Part Number 4254210C91 Part Number 4254210C91
Specifications
Tank capacity 10.6, 10.8, 15.9, 19, 25.2, 32 Gallons Tank capacity 10.6, 10.8, 15.9, 19, 25.2, 32 Gallons
DEF Header Height (IN) 25 DEF Header Height (IN) 25
DEF Return Fitting Dia. (IN) 5/16 SAE J2044 DEF Return Fitting Dia. (IN) 5/16 SAE J2044
Coolant Outlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Outlet Fitting Dia. (IN) 5/8 Hose Bead
Electrical Connector Deutsch DT4 (STD) Electrical Connector Deutsch DT4 (STD)
Sensor Type Digital (canbus) Sensor Type Digital (canbus)
DEF Suction Fitting Dia. (IN) 3/8 SAE J2044 DEF Suction Fitting Dia. (IN) 3/8 SAE J2044
Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead
In-Tank Filter 40µ In-Tank Filter 40µ
Tank Interface 6 Bolt Tank Interface 6 Bolt

Useful Information

Description and Purpose:

Meet Part number: 4254210C91, a New Genuine DEF Header from International / Navistar designed to keep your SCR system flowing smoothly. Equipped with 3/8 SAE J2044 suction and 5/16 SAE J2044 return fittings, plus 5/8 coolant inlets/outlets, it regulates DEF flow and temperature while a 40µ in-tank filter prevents clogs. The digital canbus sensor constantly tracks level and quality across tank capacities from 10.6 to 32 gallons.

Why Replacement is Important:

Without a functioning header, DEF can stagnate or misreport, triggering system warnings or reduced engine output.

Impact on Vehicle Performance:

Replacing this header restores accurate DEF delivery, keeps emissions systems happy, and ensures smooth engine operation under all conditions.

Manufacturer Information:

International® designs parts to deliver optimized durability under continuous load stress, ideal for regional and long-haul trucks.

Navistar® supports emissions-compliant operation with engineered systems built to meet strict performance and regulatory standards.

Tags & Category: DEF Header, DEF Tank Head, Diesel Exhaust Fluid Header Module, DEF Sensor Head, DEF Quality Sensor, DEF Level Sensor, DEF Header 25 Inch, 3/8 SAE J2044 Suction, 5/16 SAE J2044 Return, 5/8 Hose Bead Coolant Ports, Coolant-Heated DEF Header, Deutsch DT4 Connector, Digital Canbus Sensor, 40 Micron DEF Filter, 6 Bolt Tank Interface, International DEF System, Navistar Emissions Component.

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The -warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 4254210C91