Cummins QSF 2.8L, ISF 2.8L Aftertreatment Hose 2014-2021: OEM 4329754
CUMMINS QSF 2.8L, ISF 2.8L AFTERTREATMENT HOSE 2014-2021: OEM 4329754
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Genuine New, Cummins Aftertreatment Hose, Cummins part number 4329754 ( OEM Part Number 4329754 ).This part is primarily made for a Cummins QSF 2.8L, ISF 2.8L, production years 2014-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 4329754 |
| Additional OEM | 4329754, A046F438 |
ADDITIONAL DETAILS
| CONDITION | Genuine New |
| UPC / Barcode | 00840490556942 |
| WEIGHT | 1.00 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"
Serving as an essential connection within the emissions system, the Cummins QSF 2.8L / ISF 2.8L Aftertreatment Hose (2014–2021) OEM 4329754 is designed to maintain proper exhaust aftertreatment operation. Manufactured to meet original equipment specifications, it ensures precise compatibility with Cummins QSF 2.8L and ISF 2.8L engines across the specified model years. This aftertreatment hose provides a secure pathway between key emissions system components, helping maintain proper exhaust flow and system integrity under demanding operating conditions. Constructed from durable, high-quality materials, it is engineered to withstand high temperatures, pressure, vibration, and continuous use in diesel applications. Ideal for technicians, fleet operators, and maintenance professionals, this OEM aftertreatment hose helps ensure dependable emissions system function and long-term reliability.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2014 | Cummins | QSF 2.8L | ISF 2.8L | |||
| 2015 | Cummins | QSF 2.8L | ISF 2.8L | |||
| 2016 | Cummins | QSF 2.8L | ISF 2.8L | |||
| 2017 | Cummins | QSF 2.8L | ISF 2.8L | |||
| 2018 | Cummins | QSF 2.8L | ISF 2.8L | |||
| 2019 | Cummins | QSF 2.8L | ISF 2.8L | |||
| 2020 | Cummins | QSF 2.8L | ISF 2.8L | |||
| 2021 | Cummins | QSF 2.8L | ISF 2.8L | |||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins QSF 2.8L, ISF 2.8L Aftertreatment Hose (OEM 4329754) is an important component of the emissions system designed for 2014–2021 Cummins QSF 2.8L and ISF 2.8L engines. Its main function is to provide a secure connection between aftertreatment components, allowing exhaust gases or system media to move efficiently through the emissions-control system. A properly functioning aftertreatment system depends on secure, leak-free connections between its components.
Although it may appear to be a simple hose, it plays a significant role in maintaining the integrity and efficiency of the entire aftertreatment system.
Main Functions of the Cummins 4329754 Aftertreatment Hose
- Provides a secure connection
- The hose connects compatible aftertreatment components, helping maintain a reliable and properly sealed emissions system.
- Maintains proper system flow
- It allows exhaust gases or system media to move efficiently between connected components without unnecessary restrictions.
- Prevents leaks
- A properly sealed hose helps minimize leaks that could affect aftertreatment performance or lead to emissions-related issues.
- Supports the complete aftertreatment system
- It works alongside components such as the DOC, DPF, SCR system, sensors, and related hardware to help maintain efficient emissions control.
- Withstands demanding operating conditions
- Built for heavy-duty diesel applications, the hose is designed to resist high temperatures, vibration, and continuous engine operation.
- Helps maintain emissions compliance
- By preserving the integrity of the aftertreatment system, the hose contributes to consistent emissions performance and reliable engine operation.
The Cummins QSF 2.8L, ISF 2.8L Aftertreatment Hose (OEM 4329754) is more than just a connecting hose—it is an essential part of the emissions system that helps maintain secure connections, proper flow, and dependable aftertreatment performance. Keeping this hose in good condition helps support the efficiency of the complete emissions system and the long-term reliability of compatible Cummins QSF 2.8L and ISF 2.8L engines.
While your vehicle may still be operable with a bad aftertreatment hose, it is not recommended to continue driving for an extended period. A damaged aftertreatment hose can affect the performance of your emissions system, trigger warning lights, and potentially lead to additional damage if the issue is left unresolved.
The severity of the problem depends on whether the hose is leaking exhaust gases, DEF, or has become restricted or disconnected.
Here are some of the risks of continuing to drive with a bad aftertreatment hose:
- Check engine light
- A damaged hose can trigger emissions-related fault codes, causing the check engine light to illuminate.
- Reduced aftertreatment system efficiency
- Leaks or restrictions can prevent the emissions system from operating correctly, reducing its ability to control exhaust emissions.
- Engine derate or reduced-power mode
- Many diesel engines will limit engine output when a significant aftertreatment system fault is detected to protect the engine and emissions components.
- Exhaust or DEF leaks
- A cracked or disconnected hose may allow exhaust gases or Diesel Exhaust Fluid (DEF) to escape, reducing system efficiency and potentially affecting nearby components.
- Additional stress on emissions components
- Continuing to drive with a damaged hose can place extra strain on the SCR system, DPF, sensors, and other aftertreatment components, increasing the risk of further repairs.
- Failed emissions inspections
- A malfunctioning aftertreatment hose can contribute to emissions system faults that may prevent the vehicle from meeting emissions requirements.
If you suspect your aftertreatment hose is damaged, it's best to have it inspected and repaired as soon as possible. Driving a short distance to a repair facility is generally acceptable, but delaying repairs can lead to more extensive emissions system damage, increased downtime, and higher repair costs.
The OEM 4329754 is designed to connect designated air passages within the aftertreatment system, helping maintain the factory-designed airflow between compatible emissions components on Cummins QSF 2.8L and ISF 2.8L engines.
The molded design allows the hose to follow the factory routing, helping maintain proper clearance from surrounding engine components while supporting unrestricted airflow.
Yes. The hose is manufactured from reinforced materials that are designed to withstand continuous engine vibration and movement commonly experienced in industrial diesel applications.
The hose should be installed using the correct OEM-style clamps or approved replacement hardware specified for the application to help maintain a secure, leak-free connection.
Cummins Aftertreatment Hoses
