Paccar’s MX family of engines powers a huge share of the Kenworth and Peterbilt Class 8 fleet, and injector wear is one of the leading drivers of unplanned downtime on these trucks. HD Injectors’ remanufactured Paccar fuel injectors are rebuilt on genuine OEM cores, restored to factory flow specs, and flow-tested and high-pressure leak-tested before they ship. Whether you run MX-13 or MX-11, we cover the major EPA emissions variants in one place.
Paccar Engines We Cover
- Paccar MX-13 injectors — EPA10, EPA13, EPA17, and EPA21 variants
- Paccar MX-11 injectors — medium-duty and regional-haul applications
Why Choose HD Injectors for Paccar Injector Replacement
- Budget-friendly compared to new Paccar OEM pricing
- Eliminate engine knocking caused by worn injector nozzles
- Reduce smoke and regen frequency with correct atomization
- Regain lost fuel economy on long-haul and regional duty cycles
- Flow-tested to OEM spec on calibrated diesel test benches
Our Paccar Rebuild Process
Every Paccar MX-series injector is stripped to its core, ultrasonically cleaned, and inspected. High-wear components are replaced with OEM-spec parts, then each injector is flow-tested, pressure-tested, and leak-tested to factory standards.
Shop Paccar Injectors at HD Injectors
Browse our full Paccar injector catalog, MX-13 (all EPA variants), MX-11, and 7th injector / DEF doser components, all remanufactured to OEM spec and ready to ship. Not sure which Paccar injector fits your Kenworth or Peterbilt? Fill out our Make Sure It Fits form and our team will identify the correct part number based on your truck’s VIN or engine serial number.
Paccar Injector Frequently Asked Questions
What Paccar engines does HD Injectors cover?
We cover the Paccar MX-13 (all major EPA variants — EPA10, EPA13, EPA17, and EPA21) and the Paccar MX-11, plus related aftertreatment components like the Paccar 7th injector and DEF doser.
What's the difference between a Paccar MX-13 and MX-11?
The MX-13 is a 12.9L Class 8 engine typically used in long-haul tractors. The MX-11 is a 10.8L engine targeted at medium- and heavy-duty vocational and regional applications where weight savings matter. They use different injectors and part numbers.
Are your Paccar injectors remanufactured or aftermarket?
HD Injectors’ Paccar injectors are remanufactured on genuine OEM Paccar cores using OEM-spec internal components, not low-cost aftermarket copies.
Do I need ECM programming after installing new Paccar injectors?
Yes, in most cases. Current-generation MX-13 and MX-11 injectors carry calibration codes that must be programmed into the ECM during installation to achieve correct cylinder balance and emissions compliance.
Contact Us!
We’ll be happy to answer all of your questions. Our expertise in turbo engines and combined 20 years of experience plus modern, top quality equipment is all you need.
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Want to talk to our support team? Call us at (847) 258-3785
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