Freightliner | DuraWRX Header | 04-31677-001
Aftermarket DuraWRX Header. Replaces OEM 04-3167-001. No core needed. Built to OEM standards for durability and performance. Backed by full manufacturer warranty.
Freightliner | DuraWRX Header | 04-31677-001
Ensure reliable emissions performance with this aftermarket DEF header, designed as a direct-fit replacement for OEM 04-31677-001 used in Freightliner and Western Star trucks. Compatible with 13 and 23-gallon DEF tanks, this header meets OEM standards for quality, durability, and performance in demanding diesel applications.
Engineered to withstand harsh environments, it delivers accurate DEF level, temperature, and quality readings to keep your emissions system running smoothly. Its durable construction resists DEF crystallization and thermal wear, helping prevent premature failure and system derates.
This header is a no-core-required unit, meaning there’s no need to return your old part—saving you time and simplifying your maintenance process. With a plug-and-play design, installation is fast and straightforward, requiring no special tools or modifications.
Ideal for fleet maintenance teams, owner-operators, and diesel repair shops, this DEF header provides long-lasting performance and is backed by a full manufacturer warranty for added peace of mind.
Upgrade your truck’s DEF system with confidence—choose a cost-effective, high-quality solution that performs like OEM without the dealer price tag.
Freightliner Cummins 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.
Freightliner Cummins Header Specs:
Please confirm your OEM or Aftermarket number matches before ordering.
04-31677-001
04-30798-001
ASPFL2337
ASPFL-2337
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 | 257001 |
|---|---|
| OEM | Aftermarket Numbers | 04-31677-001 04-30798-001 ASPFL2337 ASPFL-2337 |