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Cummins ISC, ISL, 8.3L Fuel Injector 2003-2012: OEM 5263305RX ( Set of 6 )

CUMMINS ISC, ISL, 8.3L FUEL INJECTOR 2003-2012: OEM 5263305RX ( SET OF 6 )

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$2,160.00

CORE CHARGE:

$900.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER5263305RX
PART TYPEFuel Injector
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISC, ISL, 8.3L
YEAR2003-2012
PART NUMBERDE814-SET

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Fuel Injector, Tamerx part number DE814-SET ( OEM Part Number 5263305RX ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Cummins ISC, ISL, 8.3L, production years 2003-2012, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5263305RX
Additional OEM3965720, 4940439, 5263305, 5268436, 0986435532, 04451201120445120272, 5263305RX, 87581565

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode
WEIGHT9.30 LBS

SHIPPING OPTIONS

Ship Weight : 9.30 LBS
UPS Ground, 2nd Day Air, Next Day Air

SHIPPING POLICY

Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.

The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.

Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.

Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".

If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.

As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.

What is a Core Charge?

A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.

30 Day Core Charge Hold

You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.

The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.

The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.

All fluids must be drained.

If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.

Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.


Restore smooth power and dependable fuel delivery to your Cummins ISC, ISL 8.3L engine with this set of 6 OEM Fuel Injectors (5263305RX), built for 2003–2012 models. These remanufactured injectors are precision-engineered to ensure consistent spray patterns, improved combustion, and reliable engine performance. Whether you're maintaining your fleet or replacing worn components, this injector set is the key to keeping your diesel engine running strong and efficient.

FITMENT CHART

YEARMAKEENGINE(S)
2003Cummins ISC ISL 8.3L
2004Cummins ISC ISL 8.3L
2005Cummins ISC ISL 8.3L
2006Cummins ISC ISL 8.3L
2007Cummins ISC ISL 8.3L
2008Cummins ISC ISL 8.3L
2009Cummins ISC ISL 8.3L
2010Cummins ISC ISL 8.3L
2011Cummins ISC ISL 8.3L
2012Cummins ISC ISL 8.3L

PEOPLE ALSO ASKS | BLOG(S)

The Cummins ISC, ISL, and 8.3L engines are renowned for their reliability and performance. Central to their operation is the fuel injector, specifically the OEM 5263305RX model. This injector set, designed for models from 2003 to 2012, plays a crucial role in ensuring optimal engine performance.

Key Components of the Fuel Injector

A fuel injector is a complex component made up of several parts, each contributing to its function. Here are the main components of the Cummins ISC, ISL, 8.3L Fuel Injector:

  • Nozzle
    • Delivers the fuel into the combustion chamber in a fine spray.
  • Plunger and Barrel
    • Work together to pressurize the fuel before injection.
  • Solenoid
    • Controls the opening and closing of the injector valve.
  • Return Spring
    • Ensures the injector closes after the fuel is delivered.
  • Injector Body
    • Houses all the components and maintains the structural integrity.

Why Choose OEM 5263305RX?

Opting for the OEM 5263305RX fuel injector set ensures compatibility and performance. This set of six injectors is engineered to meet the exact specifications of Cummins engines, providing:

  • Enhanced Fuel Efficiency
    • Precisely atomized fuel for better combustion.
  • Improved Engine Performance
    • Smooth and consistent power delivery.
  • Durability
    • High-quality materials and construction for long-term reliability.

Benefits of Regular Maintenance

Maintaining your fuel injectors is crucial for engine health. Regular inspection and cleaning can prevent common issues such as:

  • Clogging
    • Prevents fuel delivery problems.
  • Leakage
    • Ensures proper fuel pressure and efficiency.
  • Wear and Tear
    • Extends the lifespan of the injectors.

By understanding the components and benefits of the Cummins ISC, ISL, and 8.3L fuel injectors, you can make informed decisions about maintenance and replacements, ensuring your engine runs smoothly and efficiently.

When it comes to maintaining your diesel engine, a common question is whether you can reuse your fuel injectors. Fuel injectors play a critical role in delivering fuel to the engine efficiently, and their performance can significantly impact the overall health of your vehicle.

Considerations for Reusing Fuel Injectors

Before deciding to reuse your fuel injectors, it's important to evaluate their condition and performance. Here are some key considerations:

  • Age and Mileage
    • If your fuel injectors have high mileage or have been in use for several years, they may be worn out.
  • Performance Issues
    • If you've noticed any decrease in engine performance, it could be a sign that your injectors need replacing.
  • Inspection and Testing
    • Have your injectors inspected and tested by a professional to ensure they are functioning properly.

Benefits of Replacing Fuel Injectors

While reusing fuel injectors might seem cost-effective, there are significant benefits to replacing them with new or remanufactured ones from Tamerx Diesel Products:

  • Improved Engine Performance
    • New injectors can restore your engine’s power and efficiency.
  • Fuel Efficiency
    • Replacing old injectors can improve fuel economy, saving you money in the long run.
  • Reduced Emissions
    • New injectors ensure optimal fuel combustion, reducing harmful emissions.

At Tamerx Diesel Products, we offer high-quality, fuel injectors that meet OEM standards, ensuring top quality and reliability. Investing in new injectors can save you from potential engine damage and costly repairs.

It delivers metered fuel into the combustion chamber at the right time to support engine operation.

Common signs include engine misfires, rough idle, poor acceleration, and increased smoke.

Yes, faulty injectors can make it difficult for the engine to start or stay running.

With regular maintenance, these injectors typically last between 200,000 and 300,000 miles.

 

Cummins Fuel Injectors

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