Blue Bird Bus | DEF Header | 10056545
High-quality aftermarket DEF header—brand new, no core required. Direct replacement for OEM #10056545 & compatible models. Built to OEM specs for reliable performance and long-term durability.
DEF Header | 10056545
Boost your diesel truck’s emissions performance with this high-quality aftermarket DEF header—precision-designed as a direct-fit replacement for OEM 10056545. Engineered for long-term reliability, it ensures accurate DEF fluid level and temperature readings, critical for proper SCR (Selective Catalytic Reduction) function.
This DEF header is brand new and requires no core, making it a faster, cleaner, and more affordable option for quick repairs or planned maintenance. Constructed from durable, corrosion-resistant materials, it's built to withstand tough operating environments, from long hauls to harsh weather.
Whether you manage a fleet or maintain a single heavy-duty vehicle, this component is built to OEM specifications for plug-and-play compatibility and minimal downtime. Ideal for operators who demand emissions compliance and top-tier DEF system performance—without the high OEM cost.
Backed by a manufacturer warranty and ready to ship, this DEF header is a reliable choice for professional mechanics, fleet managers, and truck owners.
Order now to restore your DEF system with a durable, OEM-quality header designed to perform under pressure with American Radiator.
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.
10019935
10027844
10035950
10056545
5011806
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 | 256545 |
|---|---|
| OEM | Aftermarket Numbers | 10019935 10027844 10035950 10056545 5011806 ASP5310-6606718 ASP53106606718 |