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Cummins ISB 6.7L High Pressure Fuel Rail 2022-2025: OEM 5566376

CUMMINS ISB 6.7L HIGH PRESSURE FUEL RAIL 2022-2025: OEM 5566376

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$495.00

CORE CHARGE:

$150.00
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 NUMBER5566376
PART TYPEHigh Pressure Fuel Rail
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISB 6.7L
YEAR2022-2025
PART NUMBER5566376RM

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx High Pressure Fuel Rail, Tamerx part number 5566376RM ( OEM Part Number 5566376 ). 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 ISB 6.7L, production years 2022-2025, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5566376
Additional OEM5566376

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490538337
WEIGHT10.00 LBS

SHIPPING OPTIONS

Ship Weight : 10.00 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.


Manufactured for 2022–2025 Cummins ISB 6.7L engine applications, the OEM 5566376 High Pressure Fuel Rail is engineered to meet original equipment specifications for precise fit and dependable operation. This fuel rail serves as the central manifold that distributes high-pressure fuel evenly to each injector in the common rail system. Built with durable materials and designed for tight tolerances, it is suited for the rigorous demands of modern diesel fuel systems. Proper fuel rail function supports balanced fuel delivery, consistent combustion, and controlled emissions output. Tamerx Diesel Products LLC offers this Cummins ISB 6.7L high pressure fuel rail as a reliable solution for maintaining efficient fuel system operation.

FITMENT CHART

YEARMAKEENGINE(S)
2022Cummins ISB 6.7L
2023Cummins ISB 6.7L
2024Cummins ISB 6.7L
2025Cummins ISB 6.7L

PEOPLE ALSO ASKS | BLOG(S)

The Cummins ISB 6.7L High Pressure Fuel Rail OEM 5566376 is a critical component in the engine’s fuel system, especially for modern common rail diesel engines used from 2022 through 2025. Its primary purpose is to act as the central distributor of highly pressurized fuel to each fuel injector.

In a common rail system, fuel is pressurized by the high-pressure pump and stored in the rail before being delivered to the injectors. The rail ensures that this pressurized fuel is available evenly and instantly to every cylinder.

This component is important because it:

  • Maintains stable high pressure for fuel delivery
  • Distributes pressurized fuel evenly to all injectors
  • Helps support precise fuel metering and timing
  • Contributes to consistent combustion in each cylinder
  • Works with sensors and control systems for optimized operation

Without a properly functioning high pressure fuel rail, fuel pressure could fluctuate, leading to uneven fuel supply. This can result in rough operation, poor combustion control, increased emissions, and diagnostic fault codes.

The OEM 5566376 rail is engineered to meet Cummins factory specifications, ensuring proper fit, structural integrity, and compatibility with electronic sensors. These sensors monitor rail pressure and send data to the engine control module (ECM) to precisely regulate fuel delivery.

In summary, the Cummins ISB 6.7L High Pressure Fuel Rail OEM 5566376 is essential for reliable, balanced fuel distribution and consistent engine operation in modern diesel applications.

The high pressure fuel rail delivers pressurized fuel from the pump to the injectors. Because it operates under extreme pressure, even small issues can cause noticeable engine problems. Recognizing the symptoms early can help prevent further fuel system damage.

One of the most common signs is inconsistent fuel pressure.

If the fuel rail or its pressure sensor begins to fail, you may notice:

  • Hard starting or extended cranking
  • Rough idle
  • Engine misfires
  • Sudden stalling
  • Loss of acceleration
  • Check engine light with fuel pressure codes
  • Strong fuel odor near the engine

In some cases, internal cracks or leaks can develop in the rail. This may lead to visible fuel leakage, which requires immediate attention due to safety concerns.

A faulty fuel rail pressure sensor can also mimic rail failure by sending incorrect readings to the engine control module. This can cause erratic fuel delivery and drivability issues.

Because the entire high pressure fuel system works together, professional diagnostics are important. A technician will test fuel pressure readings, inspect for leaks, and scan for related fault codes before confirming whether the fuel rail itself is failing.

Addressing the issue promptly helps protect injectors and other critical fuel system components.

A properly functioning 5566376 fuel rail helps maintain correct fuel delivery to each injector for smooth combustion.

The OEM 5566376 high pressure fuel rail is engineered for use on Cummins ISB 6.7L engines from 2022 through 2025.

The 5566376 high pressure fuel rail is engineered for direct fitment on the specified Cummins ISB 6.7L applications.

Verifying OEM 5566376 ensures you select the correct fuel rail for the specific 2022–2025 ISB 6.7L engine configuration.

Cummins High Pressure Fuel Rails