Loading...

Cummins ISB 6.7L, QSB Fuel Injector : OEM 5263314 ( Set of 6 )

CUMMINS ISB 6.7L, QSB FUEL INJECTOR : OEM 5263314 ( SET OF 6 )

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$2,274.00

CORE CHARGE:

$1,500.00
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 NUMBER5263314
PART TYPEFuel Injector
BRANDCummins
ENGINE MAKECummins
ENGINE TYPEISB 6.7L, QSB
YEAR
PART NUMBER5263314-SET

PRODUCT DESCRIPTION

This is a Genuine New, Cummins Fuel Injector, Cummins part number 5263314-SET ( OEM Part Number 5263314 ). This part is primarily made for a Cummins ISB 6.7L, QSB, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5263314
Additional OEM0 445 120 251, 0-445-120-251, 4955381, 5263314, 0445120251, 5263314NX, 5263314PX, 5263314RX

ADDITIONAL DETAILS

CONDITIONGenuine New
UPC / Barcode
WEIGHT7.92 LBS

SHIPPING OPTIONS

Ship Weight : 7.92 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.


This OEM 5263314 fuel injector set is designed for Cummins ISB 6.7L and QSB engines, providing six precision-built injectors that ensure accurate fuel delivery and consistent engine operation. Each unit is manufactured to original equipment specifications, offering a direct-fit solution for quick and reliable installation. Ideal for use in a variety of on-highway, agricultural, and industrial applications, this injector set helps maintain steady working conditions. Whether you're conducting routine maintenance or replacing a worn set, these injectors are built to support the reliability and efficiency of Cummins-powered equipment.

PEOPLE ALSO ASKS | BLOG(S)

The Cummins ISB 6.7L and QSB engines rely on accurate fuel delivery to maintain efficient performance. The OEM 5263314 fuel injectors, designed for these engines, ensure that the right amount of fuel is injected into each cylinder, supporting optimal combustion and overall engine efficiency. Regularly replacing worn or damaged injectors can prevent engine issues like misfires, poor fuel economy, and excess emissions.

Key Features of the Cummins ISB 6.7L, QSB Fuel Injector OEM 5263314

  • Precision Fuel Delivery
    • These injectors deliver the exact amount of fuel needed for each combustion cycle, ensuring smooth engine operation.
  • OEM Quality and Reliability
    • As an original equipment manufacturer (OEM) part, this injector set meets Cummins' rigorous standards, guaranteeing durability and compatibility.
  • Improved Fuel Efficiency
    • Proper fuel injection leads to better combustion, improving fuel economy and reducing overall operational costs.
  • Prevents Engine Issues
    •  Replacing worn injectors helps prevent issues such as engine misfires, poor acceleration, and excessive emissions.
  • Durable Construction
    •  Built to withstand the demands of heavy-duty engine use, these injectors offer long-lasting performance.

Why Choose the OEM 5263314 Fuel Injector Set for Your Cummins ISB 6.7L or QSB Engine?

Replacing your fuel injectors with the OEM 5263314 set ensures that your engine continues to operate efficiently, reducing fuel consumption and maintaining engine reliability. Proper fuel delivery is key to avoiding costly repairs and keeping your engine in top condition. By choosing an OEM part, you are investing in the long-term health and performance of your Cummins engine.

For those maintaining Cummins ISB 6.7L or QSB engines, investing in a high-quality injector set ensures optimal engine performance, reliability, and efficiency. Keep your engine running smoothly with the OEM 5263314 fuel injectors.

Fuel injectors are essential for delivering the right amount of fuel into your engine for efficient combustion. When fuel injectors malfunction, it can lead to a range of engine performance issues, such as rough idling, misfires, or poor fuel efficiency. Troubleshooting fuel injector problems early can help you prevent further damage to your engine and maintain its optimal performance. Here's a guide on how to troubleshoot common fuel injector issues.

  • Check for Engine Misfires

    • If your engine is misfiring or running rough, this could be a sign of clogged or malfunctioning fuel injectors. Engine misfires can cause inconsistent fuel delivery, affecting combustion.

  • Inspect Fuel Efficiency

    • A sudden drop in fuel efficiency can indicate that fuel injectors are not delivering the correct amount of fuel. This could be due to clogged or leaking injectors, which may require cleaning or replacement.

  • Listen for Unusual Noises

    • A failing fuel injector can cause unusual ticking or clicking noises, which could indicate that the injector is stuck open or closed. Using a mechanic’s stethoscope can help isolate the sound.

  • Test Fuel Injector Voltage

    • Using a multimeter, you can check the voltage going to each injector. A faulty injector may receive inadequate voltage, leading to poor performance. Consistent low voltage across injectors can also point to electrical issues.

  • Perform a Fuel Pressure Test

    • A fuel pressure gauge can measure whether your fuel injectors are receiving the right amount of pressure. Low or inconsistent pressure can suggest clogged injectors or fuel pump issues.

  • Use a Fuel Injector Cleaner

    • If minor clogging is suspected, running a fuel injector cleaner through your system can often clear out blockages and improve injector performance.

Troubleshooting fuel injector problems involves checking for engine misfires, reduced fuel efficiency, unusual noises, and testing fuel pressure and voltage. Addressing these issues early can prevent major engine damage and keep your vehicle running smoothly. Regular maintenance, such as using fuel injector cleaner and ensuring clean fuel, can help prevent these problems from arising in the first place. If problems persist, consider consulting a professional mechanic for a thorough inspection and repair of your fuel injectors.

Symptoms include rough idling, decreased fuel efficiency, engine misfires, and increased exhaust emissions.​

Yes, due to the precision required, professional installation is advisable to ensure proper function and performance.​

Regularly replacing fuel filters, using high-quality fuel, and adhering to recommended service intervals help maintain injector performance and longevity.

Under proper maintenance, the injector can last 300,000–500,000 miles, depending on fuel quality and operating conditions.

Cummins Fuel Injectors