International 5 Gallon DEF Header | ASP-908-2321-297 | QLS Sensor | 6-Bolt | New

DuraWRX diesel exhaust fluid header for International and Navistar 5 gallon DEF tanks, part number ASP-908-2321-297. Replaces the International QLS sensor head unit. Six-bolt tank interface, 11 inch height, with 40 micron in-tank suction filter and digital CANbus level sensor. The six-bolt adapter ships loose for installation. Replaces Navistar 4353000C91, 4254212C91, 4163689C91 and 4097721C91.

Key Features:

• Six-bolt tank interface, adapter supplied loose
• 40 micron in-tank suction filter
• Digital CANbus sensor output
• Operating voltage range of 9 to 32 VDC
• Replaces nine Navistar part numbers, including KUS and SSI sensor builds

Specifications:

• Part number: ASP-908-2321-297
• Brand: DuraWRX
• Component type: DEF header assembly
• Tank interface: 6 bolt adapter, 4.28 in (108.6 mm) bolt circle
• Flange diameter: 5.10 in (129.5 mm)
• Tank capacity: 5 gallon
• DEF header height: 11 in
• Overall length: 11.34 in (288 mm)
• In-tank filter: 40 micron
• Sensor type: Digital CANbus
• Operating voltage: 9-32 VDC
• Electrical connection: Deutsch DT04-4P
• Mating connector: Deutsch DT06-4S
• DEF suction fitting: 3/8 in, SAE J2044
• DEF return fitting: 5/16 in, SAE J2044
• Coolant inlet and outlet fittings: 5/8 in hose bead
• Vent fitting: 3/8 in hose bead
• Navistar reference numbers: 4353000C91, 4353000C92, 4254212C91, 4163689C91, 4097721C91, 4087159C91, 2515990C3, 2515990C1, 4723151C91
• Included: Header assembly, six-bolt adapter

Wiring:

• Pin 1, green: CAN low
• Pin 2, yellow: CAN high
• Pin 3, black: ground
• Pin 4, red: power

Compatibility / Fitment:

Fits International and Navistar trucks and buses with a 5 gallon DEF tank and six-bolt header interface. It also covers Autocar applications. For Cummins EcoFit headers 5511564 and 4378049 and for JLG applications, contact us to check fitment before ordering.

Two hard fitment gates apply:

Tank capacity. International sizes its QLS sensor heads by tank. This header is for the 5 gallon tank. Larger tanks (7, 12, 15, and 10.6 through 25.2 gallon) use different headers. Confirm your tank size before ordering.

Tank interface. Six-bolt, 4.28 in bolt circle. Will not fit hose bead, SAE flange or bore-seal tanks.

Assembly note: the six-bolt adapter ships loose rather than fitted. Assemble it to the header during installation.

What is not included: the Deutsch DT06-4S mating connector is not supplied.

Common interchanges: 4353000C91, 4254212C91, 4097721C91, 4163689C91, 602062, 601965, 5511564, 4378049, 1001230419, 1001230419S, 1001278919, 1001278919S, 4723151C91, 4353000C92, 4087159C91, 2515990C3, 2515990C1

Conclusion:

DuraWRX ASP-908-2321-297 is the six-bolt DEF header for International and Navistar 5 gallon DEF tanks, replacing the Navistar QLS sensor head under nine part numbers. Confirm your tank capacity before ordering — the 7 gallon and larger tanks use different headers.