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Engineered Diesel

50hp 5.9L Cummins CR Fuel Injector 2003 - 2004 - Set (Early Pattern)

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Your Price:
$2,352.00 (You save $828.00)
12.00 LBS
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Product Description

 *Image is a representation of this item. Actual item may vary.

50hp 5.9L Cummins CR  Fuel Injector 2003 - 2004 - Set (Early Pattern)


Replaces Part Numbers:

Bosch: 0445120255, 0986435503, 0445120018, 0445120113, 0445120210

Mopar: R8004082AA, R8004082AB, R8004082AC, R5086894AA

Cummins: 3949619, 4940589, 5254686, 5283318



Great Upgrade for Stock Trucks! (and relatively stock trucks) 


*Replaces your STOCK injectors with NO additional modifications required to run! This means YOU get more power at STOCK prices! Just bolt-on and go!*



OEM FEED TUBES - It is highly recommended to replace the connector tube at the time of injector replacement. If an old connector tube is re-used, it can introduce debris into the system or a repeat leakage failure can occur, damaging the body of the new injector (which is not a warrantable failure). 


**WARRANTY: 1yr/unlimited mileage warranty, unless otherwise specified. Covers manufacturer defects and faulty workmanship. DOES NOT COVER FAILURE DUE TO DEBRIS IN THE INJECTOR, BAD FUEL, DIRTY INSTALL, FAILED FEED TUBES, ETC.  ALSO NOT COVERED: damage due to water, gasoline, or other contaminants in the fuel. Operating any injector on any fuel other than commercially available petroleum diesel including biodiesel and any homemade blends may result in jeopardizing the warranty. If the injectors are being replaced due to contaminated fuel, the feed tubes must be replaced. All customers are highly advised to use Stanadyne performance formula diesel fuel additive!**



This product will be shipped USPS Priority Mail. If you would like to upgrade your shipping, you will be required to pay full price for shipping.

Call 616.892.8204 to upgrade your shipping.


*REQUIRED: You must choose to either pay your core charge now or waive your core charge and mail us your cores first.*


US Orders: Core charge will be refunded if core is returned within 30 days of ship date.

CANADIAN Orders: Core charge will be refunded if core is returned within 60 days of ship date.


**Mail cores to the following address**


Attn: Cores 

Engineered Diesel

8566 Lake Michigan Dr 

Allendale, Mi 49401



Product Videos

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Product Reviews

Showing reviews 1-3 of 8 | Next

  1. Good Product! 4 Star Review

    Posted by on 25th May 2017

    Brand new injectors, had everything needed for the installation. Once the injectors where installed the idle is very smooth, builds good power now. Definitely worth the money

  2. Bolt on HP! 5 Star Review

    Posted by on 25th Feb 2017

    I put the 50hp injectors in and the truck never started so good before and the power is awesome the mileage is creeping up !! Good stuff

  3. 50hp injectors for the work truck 5 Star Review

    Posted by on 13th Sep 2016

    So 2 of my injectors were failing and the others werent doing so well either. 131k miles 2003 cummins. Only mods I have are your typical stuff. MBRP exhaust, s&b intake, intake horn,and a banks economind to give it a little power, saftey features, and all the gauges I need on the IQ.

    I first found engineered diesel while doing a google search about cummins injectors. Found a thread on one of the diesel forums. Were they had done an educational write up on explaining the differences between injectors, different ways they were cut, and different spray patterns.

    They discussed how their 50hp injectors worked. As well as how proper 50hp inkectors shouldnt haze or smoke if the spray pattern is right. They also recommended them as a replacement for stock ones with out having to get some custom tune. Which for me meant having to spend less money for a very expensive repair.

    When I ordered the injectors they came promptly, and very well packaged to protect my investment. I had also ordered their fuel tubes as well per their recommendation.

    After having them installed and driving on them for the first time. It was a night and day difference. Responsiveness, power, no more bogging down between shifts. It wasnt just like a new truck it was better. I always enjoy driving my truck but I literally drove home with a grin ear to ear.

    It has been 2 weeks now sense I have had the 50hp injectors and fuel tubes. Despite the blow of being an expensive repair. I would definitely choose the 50hp over stock ones everyday of week. My MPG has improved as well which is a definite plus in my book.

    Thanks for all the help guys.

Showing reviews 1-3 of 8 | Next

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