Freightliner DEF Header | Detroit Diesel 04-31677-000
Aftermarket DEF Header. No core required. Replaces OEM #04-31677-000 and others. Built to OEM standards for durability and performance. Backed by a full manufacturer warranty.
ASPFL-2325
Maintain your diesel vehicle’s emissions system with a high-quality aftermarket DEF Header—designed as a direct replacement for OEM #04-31677-000. This brand-new unit requires no core return and is engineered to meet or exceed OEM specifications, making it ideal for heavy-duty trucks, buses, and off-road equipment.
Built for durability and reliability, this DEF Header plays a critical role in monitoring DEF fluid levels and temperatures, helping to prevent engine derates and emission-related fault codes. Whether you're maintaining a single truck or an entire fleet, this component delivers consistent performance in demanding operating environments.
Installation is simple, with no programming or modifications required. Backed by a manufacturer warranty, it offers peace of mind and long-term value. American Radiator ensures fast shipping and expert customer support, so you can minimize downtime and keep your vehicle compliant with EPA regulations.
This DEF Header is compatible with multiple diesel platforms and is trusted by fleets and mechanics across the country. Order today to restore proper DEF system function and extend the life of your emissions system.
DEF Header Features:
Designed For:
Manufacturer Warranty
DuraWRX provides a manufacturer's warranty on its DEF-related products for up to 2 years/40,000 miles/1,200 hours (whichever occurs first). This warranty covers any defects in materials or workmanship. To be eligible for a claim, the end user must register their product purchase on the DuraWRX site. To file a claim, customers must contact DuraWRX to receive a return shipping label. Once the product is returned and the claim is approved, DuraWRX will issue either a refund or a credit.
DEF Header Specs:
Please confirm your OEM or Aftermarket number matches before ordering.
04-27881-000
0427881000
04-30798-000
0430798000
04-31677-000
0431677000
04-31893-000
0431893000
ASPFL-2325
ASPFL2325
Shipping & Returns
Why Buy From American Radiator?
Trust American Radiator, your reliable source for quality cooling solutions since 2001. With roots in the industry dating back to the 1970s, our team brings decades of experience delivering high-performance radiators, charge air coolers, and DPF systems at competitive prices.
We work directly with trusted domestic and international manufacturers that supply OEM-grade components, ensuring every product meets or exceeds original equipment standards. Whether you need a heavy-duty truck radiator or a replacement for your DEF Header, we’re committed to providing durable, cost-effective solutions that perform.
Have questions? Contact our experienced inside sales team at 888-483-5763 for expert guidance and fast, friendly support.
| Part Number | SKU | 257000 |
|---|---|
| OEM | Aftermarket Numbers | 04-27881-000 0427881000 04-30798-000 0430798000 04-31677-000 0431677000 04-31893-000 0431893000 ASPFL-2325 ASPFL2325 |