Description
Overview:
New DuraWRX ASPFL-2326 DEF header for 13- and 23-gallon diesel exhaust fluid tanks with an SAE J2587 flange on Freightliner and Western Star chassis with Cummins X15, X12, L9, B6.7 / ISB 6.7 and ISL engines. Replaces Freightliner 04-35959-002 and the earlier 04-35959 and 04-31353 headers. This is the 20 in header with a 5/16 in DEF suction fitting.
Specifications:
- Part number: DuraWRX ASPFL-2326
- Replaces: Freightliner 04-35959-002, 04-35959-001, 04-35959-000, 04-31353-005, 04-31353-004, 04-31353-002, 04-31353-001
- Brand: DuraWRX
- Condition: New Aftermarket
- Component type: DEF tank header assembly
- Tank size: 13 or 23 gallon
- Tank interface: SAE J2587 flange
- Header height: 20 in
- Level sensor: Digital (CAN bus)
- Electrical connector: AMP 1-1703818-1
- DEF suction fitting: 5/16 in SAE J2044
- DEF return fitting: 3/8 in SAE J2044
- Coolant inlet / outlet: VDA NW08 nipple
- In-tank filter: 40 micron
- Integrated vent: No
- Integrated coolant control valve (CCV): No
- Operating voltage: 7.5-32 VDC
- Engines: Cummins X15, X12, L9, B6.7 / ISB 6.7, ISL
- Country of origin: China
Compatibility / Fitment:
Fits 13- and 23-gallon, SAE-flange DEF tanks originally fitted with Freightliner header 04-35959-002, 04-35959-001, 04-35959-000, 04-31353-005, 04-31353-004, 04-31353-002 or 04-31353-001. Applications include Freightliner Cascadia, Coronado, 108SD, 114SD, 122SD and M2 trucks, Western Star 4700, 47X, 4900 and 49X trucks, and motorhomes on the Freightliner XC chassis:
| Make | Model | Years | Chassis | Engine | DEF Tank | Application |
|---|---|---|---|---|---|---|
| American Coach | American Dream | 2018-2023 | Freightliner XCM | ISL, L9 | 13 Gallon | Motorhome |
| American Coach | American Dream SE | 2018 | Freightliner XCM | ISL | 13 Gallon | Motorhome |
| American Coach | American Revolution | 2018-2020 | Freightliner XCM | ISL, L9 | 13 Gallon | Motorhome |
| American Coach | American Revolution SE | 2018 | Freightliner XCM | ISL | 13 Gallon | Motorhome |
| American Coach | American Tradition | 2021-2023 | Freightliner XCM | L9 | 13 Gallon | Motorhome |
| Coachmen | Sportscoach | 2018-2020 | Freightliner XCR | ISB 6.7 | 13 Gallon | Motorhome |
| Coachmen | Sportscoach RD | 2021-2024 | Freightliner XCR | ISB 6.7 | 13 Gallon | Motorhome |
| Coachmen | Sportscoach SRS | 2018-2024 | Freightliner XCS | ISB 6.7 | 13 Gallon | Motorhome |
| Fleetwood RV | Discovery | 2018-2024 | Freightliner XC Series, Freightliner XCM, Freightliner XCS | ISB 6.7 | 13 Gallon | Motorhome |
| Fleetwood RV | Discovery LXE | 2018-2024 | Freightliner XCM | ISB 6.7, ISL | 13 Gallon | Motorhome |
| Fleetwood RV | Frontier | 2022-2024 | Freightliner XCR | ISB 6.7 | 13 Gallon | Motorhome |
| Fleetwood RV | Frontier GTX | 2023-2024 | Freightliner XCR | ISB 6.7 | 13 Gallon | Motorhome |
| Fleetwood RV | Pace Arrow | 2018-2023 | Freightliner XCM, Freightliner XCS | ISB 6.7 | 13 Gallon | Motorhome |
| Fleetwood RV | Pace Arrow LXE | 2018-2021 | Freightliner XCM | ISB 6.7 | 13 Gallon | Motorhome |
| Forest River | Berkshire | 2018-2023 | Freightliner XCR | ISB 6.7 | 13 Gallon | Motorhome |
| Forest River | Berkshire XL | 2018-2023 | Freightliner XCR | ISL | 13 Gallon | Motorhome |
| Forest River | Legacy | 2017-2018 | Freightliner XCS | ISB 6.7 | 13 Gallon | Motorhome |
| Freightliner | 108 SD | 2018-2024 | L9 | 13 / 23 Gallon | Truck | |
| Freightliner | 114 SD | 2018-2024 | L9, X12 | 13 / 23 Gallon | Truck | |
| Freightliner | 122 SD | 2017-2024 | X15 | 13 / 23 Gallon | Truck | |
| Freightliner | Cascadia | 2017-2024 | X15, X12 | 13 / 23 Gallon | Truck | |
| Freightliner | Coronado | 2017-2019 | X15 | 13 / 23 Gallon | Truck | |
| Freightliner | M2 | 2018-2024 | L9 | 13 / 23 Gallon | Truck | |
| Freightliner | XC Chassis | 2018-2024 | Freightliner XC Series | B6.7, L9 | 13 / 23 Gallon | Truck |
| Holiday Rambler | Armada | 2021-2024 | Freightliner XCM | ISL | 13 Gallon | Motorhome |
| Holiday Rambler | Endeavor | 2018-2024 | Freightliner XCM | ISB 6.7, ISL | 13 Gallon | Motorhome |
| Holiday Rambler | Endeavor XE | 2018 | Freightliner XCM | ISB 6.7 | 13 Gallon | Motorhome |
| Holiday Rambler | Nautica | 2021-2024 | Freightliner XCR | ISB 6.7 | 13 Gallon | Motorhome |
| Holiday Rambler | Navigator | 2018-2023 | Freightliner XCM | ISB 6.7 | 13 Gallon | Motorhome |
| Holiday Rambler | Navigator XE | 2018 | Freightliner XCM, Freightliner XCS | ISB 6.7 | 13 Gallon | Motorhome |
| Newmar | Ventana | 2018-2024 | Freightliner XCR | L9 | 13 Gallon | Motorhome |
| Thor | Aria | 2020-2024 | Freightliner XCR | ISB 6.7 | 13 Gallon | Motorhome |
| Thor | Palazzo | 2020-2024 | Freightliner XCS | ISB 6.7 | 13 Gallon | Motorhome |
| Thor | Palazzo GT | 2024 | Freightliner XCS | ISB 6.7 | 13 Gallon | Motorhome |
| Thor | Riviera | 2023-2024 | Freightliner XCS | B6.7 | 13 Gallon | Motorhome |
| Tiffin | Allegro RED | 2024 | Freightliner XC Series | L9 | 13 Gallon | Motorhome |
| Tiffin | Allegro RED 360 | 2018-2023 | Freightliner XC Series | ISB 6.7 | 13 Gallon | Motorhome |
| Tiffin | Byway | 2024 | Freightliner XC Series | B6.7 | 13 Gallon | Motorhome |
| Tiffin | Phaeton | 2018-2024 | Freightliner XC Series, Freightliner XCM, Freightliner XCR, Freightliner XCR XSH | ISL, L9 | 13 Gallon | Motorhome |
| Western Star | 4700 Series | 2018-2023 | L9, X12 | 13 / 23 Gallon | Truck | |
| Western Star | 47X | 2022-2024 | X12, L9 | 13 / 23 Gallon | Truck | |
| Western Star | 4900 Series | 2017-2023 | X15 | 13 / 23 Gallon | Truck | |
| Western Star | 49X | 2021-2024 | X15 | 13 / 23 Gallon | Truck | |
| Winnebago | Forza | 2018-2024 | Freightliner XCS | ISB 6.7 | 13 Gallon | Motorhome |
| Winnebago | Horizon | 2018-2019 | Freightliner XCM | ISL | 13 Gallon | Motorhome |
| Winnebago | Journey | 2018-2024 | Freightliner XCM | ISB 6.7, ISL | 13 Gallon | Motorhome |
Two hard fitment gates apply:
5/16 in DEF suction fitting. Freightliner Cummins trucks with 13- and 23-gallon tanks use two 20 in DuraWRX headers that look alike. This one has a 5/16 in DEF suction fitting. The earlier 2017 version has a 1/4 in suction fitting, and we also stock it. Check the suction line fitting and the Freightliner number on your old header before ordering.
SAE J2587 flange tank. This header bolts to a tank with an SAE J2587 flange. It does not fit hose-bead, six-bolt or bore-seal tanks. Headers for six-bolt and hose-bead Freightliner tanks are available separately, and we also stock them.
Other versions available: DuraWRX 20 in Cummins header with a 1/4 in suction fitting; DuraWRX headers for 10-gallon, 11.5-gallon and 6-gallon Freightliner Cummins tanks.
Common interchanges: Freightliner 04-35959-002 / 04-35959-001 / 04-35959-000 / 04-31353-005 / 04-31353-004.
The DuraWRX ASPFL-2326 is a new 20 in DEF header with a 5/16 in suction fitting for 13- and 23-gallon, SAE-flange tanks on Freightliner and Western Star Cummins chassis. It replaces Freightliner 04-35959-002. Confirm the suction fitting size and the number on your old header before ordering.









