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203-3771 | Caterpillar 3126B/C7 HEUI Fuel Injector, Remanufactured

Pricing: $244.93

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Refundable Core Charge: $175.00
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Do you know the story of your Fuel Injector? Can you say it will last a billion cycles?
We can, but our competitors can't.

When it comes to fuel injectors, we all know there are two main reasons for failure: excessive wear and deposits. And, when you shop the competition, there's no guarantee you won't have these problems weeks after your installation. Why? Because while our competition knows how to make a fuel injector shine like nobody's business, they're not the experts in getting that sweet-source-of-power to last another million miles. We are.

Each and every fuel injector from Highway and Heavy Parts has been fully disassembled, thoroughly inspected, and cleaned to perfection. Once that's complete, our suppliers (who also supply the OEM's) replace 100% of the critical components.

The result? The best ride of your life brought to you by a perfect seal, and a little extra jangle in your pocket with increased efficiency.

Need a little extra proof? Let's talk shop.
  • Let us break it down for you. The new nozzle, solenoid, NOP spring, shim, screws, and check balls in each injector provide quality, performance and durability. 
  • If they had time to lean they had time to clean. Each injector is fully dissembled, cleaned and examined to make sure you only get the the highest quality injector.
  • We will sign, "seal" and deliver you the best injectors. Surface lapping of each critical component to ensure pressure sealing of sub assemblies. Plus, all o-rings have been replaced to guarantee proper sealing.
  • HHP puts the OE to shame. Our injectors have equal or better quality compared to the OE at a much lower price and have been built to the OEM's exact specifications.
  • When you shop HHP you have our promise. All injectors meet OE quality, performance and durability.


  • (1) Fuel Injector


90-Day No Hassle Warranty,
1 Year Unlimited Mileage Warranty

OEM Applications:

  • 203-3771
  • 204-6714
  • 2225963
  • 2046714
  • 10R-1262
  • 10R1262
  • 222-5963

Technical Data

Product Attributes:
Attached Method: Bolt N
Body Material: MetalPlastic
Connector Gender: Female
Connector Shape: Oval Fuel Type: Diesel N
O-Ring Quality: 3 N

Fits Applications:
HEUI Series 3126B
7.2L Inline

Leading causes of injector failure:
- Poor fuel filtration
- Fuel contamination
- Incorrect installation
It is good practice to confirm the root cause of the failure before installing replacement injectors.


Shipping Information

  • Item Requires Shipping
  • 5.0 lbs.
  • W5.5000” x H4.0000” x L12.5000”
  • Free Shipping!

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