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Cummins QSB 6.7L High Pressure Fuel Rail 2017-2023: OEM 5304161

CUMMINS QSB 6.7L HIGH PRESSURE FUEL RAIL 2017-2023: OEM 5304161

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$795.00

AVAILABILITY IN STOCK
OEM NUMBER5304161
PART TYPEHigh Pressure Fuel Rail
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEQSB 6.7L
YEAR2017-2023
PART NUMBER5304161RM
APPLICATION NOTESTier 4

PRODUCT DESCRIPTION

This is a New, Tamerx High Pressure Fuel Rail, Tamerx part number 5304161RM ( OEM Part Number 5304161 ).This part is primarily made for a Cummins QSB 6.7L, production years 2017-2023, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM5304161
Additional OEM5304161

ADDITIONAL DETAILS

CONDITIONNew
UPC / Barcode00840490539501
WEIGHT1.00 LBS

SHIPPING OPTIONS

Ship Weight : 1.00 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.

"This Product Doesn't Have a Core"


Power your Cummins QSB 6.7L (2017–2023) with the High-Pressure Fuel Rail — OEM 5304161, built for uncompromising performance. Designed to maintain steady fuel flow under intense demand, this heavy-duty rail ensures sharp throttle response, clean combustion, and dependable power every time you start your engine. Crafted to exact OEM standards for a flawless drop-in fit, it’s the tough, reliable choice that keeps your engine running strong—mile after mile.

FITMENT CHART

YEARMAKEENGINE(S)
2017Cummins QSB 6.7L
2018Cummins QSB 6.7L
2019Cummins QSB 6.7L
2020Cummins QSB 6.7L
2021Cummins QSB 6.7L
2022Cummins QSB 6.7L
2023Cummins QSB 6.7L

PEOPLE ALSO ASKS | BLOG(S)

Fuel system reliability starts with consistent pressure delivery—and that begins with the high-pressure fuel rail. The OEM 5304161 Fuel Rail, designed for Cummins QSB 6.7L engines from 2017 to 2023, plays a vital role in maintaining balanced fuel injection, smooth operation, and engine longevity.

  • Ensures uniform high-pressure fuel distribution across all injectors, supporting consistent spray quality and balanced cylinder performance.

  • Helps maintain cleaner combustion and better fuel economy by providing a stable fuel platform critical for precise metering at the injector level.

  • Minimizes risk of pressure loss or leaks that could lead to misfires, rough idling, or inconsistent performance.

  • Engineered to Cummins specifications, enabling direct, hassle-free replacement with perfect alignment and fitment.

  • Backed by solid warranty coverage and a streamlined core return policy, providing dependable service and easier maintenance.

A properly functioning fuel rail is more than just plumbing—it’s the backbone of clean, efficient combustion and reliable injector function. Opting for the OEM 5304161 ensures stable fuel delivery, optimized engine operation, and long-term system integrity. Trust Tamerx Diesel Parts for authentic quality you can rely on.

 
 

The high-pressure fuel rail plays a crucial role in delivering fuel evenly to each injector at the correct pressure. When this component malfunctions, it can lead to poor engine performance, hard starting, or even engine failure. Knowing what typically causes these malfunctions can help vehicle owners catch issues early and prevent costly repairs.

Common Causes of High-Pressure Fuel Rail Failure

  • Contaminated Fuel
    Dirt, rust, or debris in the fuel can clog passages or damage the internal components of the fuel rail and injectors, disrupting fuel flow and pressure consistency.

  • Excessive Heat
    High engine temperatures can cause warping or fatigue in the metal components, especially around the rail seals or sensor ports, leading to leaks or erratic pressure.

  • Faulty Fuel Pressure Sensor
    A malfunctioning pressure sensor may send inaccurate data to the ECU, resulting in incorrect fuel delivery or triggering warning lights and fault codes.

  • Fuel Pump Issues
    A weak or failing high-pressure fuel pump can directly affect the pressure in the rail, causing under-delivery of fuel to the engine.

  • Leaking Injectors or Seals
    Worn or cracked injector seals may allow fuel to escape, reducing the pressure inside the rail and impairing engine performance.

  • Electrical Problems
    Corroded connectors or damaged wiring linked to the fuel pressure sensor or control module can interrupt data transmission and lead to false readings or improper pressure regulation.


Malfunctions in the high-pressure fuel rail can stem from mechanical wear, electrical issues, or fuel contamination. Regular maintenance—like fuel filter replacement and system inspections—can help prevent these problems. If your engine shows signs of power loss, misfiring, or pressure faults, addressing them early can save you from more serious fuel system damage.

 

With clean fuel and proper system maintenance, the fuel rail typically endures across full service cycles.

Leaks or pressure inconsistencies during diagnostics often suggest rail damage or seal failure.

A leak or pressure loss in the rail can compromise injector supply, leading to misfires and power loss.

By monitoring fuel pressure stability under load and visually inspecting for leaks or damage.

Cummins High Pressure Fuel Rails

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