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Thoroughbred Diesel has been your online performance headquarters since 2002. We know how to get the most performance out of your pickup truck and offer all of today's most popular diesel performance products.
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Thoroughbred Diesel offers OEM and diesel stock parts for your diesel pickup truck. At Thoroughbred Diesel, you can buy stock diesel replacement parts such as injectors, fuel pumps, ball joints, track bars, turbos, and more for your diesel truck.
Injection Pump
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Make heads turn with custom truck accessories from Thoroughbred Diesel.
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Thoroughbred Sku #: FLDFSR3963994-CRE
$1,076.35
Terms & Conditions for Cores
Many stock replacement parts such as turbos, injectors, injection pumps, and high pressure oil pumps have a core charge that is associated with the new replacement part. You must return the old part to receive a refund on the core charge.
If you plan on returning your core you have two options.
Thoroughbred Diesel offers defer the upfront core charge when purchasing via credit card payment.
OPTION 1: You can accept the core charge, which means you will be charged for the part AND the core at time of purchase. You still have the option to send it back, and if you do, the core will be refunded back on the card used, presuming the core meets core criteria and the core is returned within 30 days from the time your order is received. If you return your core after 30 days you may refer to the Core Charge Timeline below as to how you will be refunded.
Core Charge Timeline
OPTION 2: You can defer the core charge. If you defer, you will not be charged for the core at the time of purchase. You will have 21 days from the time your order is received to send the core back. If the core is not received within the 21 days, your credit card will be charged for the core amount on your order. If you return your core after 21 days, you may refer to the Core Charge Timeline below as to how you will be refunded. When Core deferral (Pay Core Charge Later) is limited to payment by credit card only. ***When using PayPal or Affirm as your method of payment “Core Deferral (Pay Core Charge Later)” is not available. The core must be paid at time of purchase. ***
Core Return Procedure
2003 - 2003 Dodge Ram 2500
2003 - 2003 Dodge Ram 3500
Now offering the Cummins 5.9L ECU for 5.9L diesel Cummins trucks. These are thoroughly remanufactured and fully programmed for your specific vehicle. Please choose your vehicle application from the order options to the left. All units go through tri-temperature testing and quality inspections. Units are programmed for specific year models, type of transmission and emission standards. If you have any troubles with choosing of application please give us a call on our toll free number and we will get you the correct module. Units are programmed and tested by order and have a typical build time of 3-5 days before shipment.
Cummins Part # 3963994
Important Ordering Info Needed When Purchasing! Units are flashed with programming for specific year and transmission type. Some vehicles have VERY specific programming so when ordering we need as much information as possible to ensure operation.
The Valve Cover Reference Number is located on the driver side of the valve cover and starts with a "53" and ends with 2 letters as shown in the photo below.
Manufacturer Warning: For vehicles with Sentry Key Immobilizer Modules (SKIM) - There is a possibility that the unit will have codes appear for the immobilizer circuit. You will need to allow for 3 drive cycles for this to go away (learning procedure for SKIM Immobilizer) only on units with SKIM. Any clear DTC will interrupt the learning procedure and the unit will no longer receive SKIM info. The unit will need to be reflashed at this point. This information will be printed on a yellow or red sheet of paper and included in the box.
You will need to provide the following information before your ECM can ship. For online orders, Thoroughbred Diesel will contact you to get this truck information below. :
The ECM’s are OEM refurbished.
1 year.