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Hollingshead Mixer Cummins ISB 6.7L DEF Head Unit

HOLLINGSHEAD MIXER CUMMINS ISB 6.7L DEF HEAD UNIT

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$895.00

CORE CHARGE:

$250.00
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 NUMBER 465-017
PART TYPE DEF Head Unit
BRAND Tamerx Diesel Products
ENGINE MAKE Cummins
ENGINE TYPE ISB 6.7L
YEAR
PART NUMBER 4310-18-7
APPLICATION NOTES Hollingshead Mixer
ADDITIONAL NOTES DEF Header, 40 MICRON, 18"

PRODUCT DESCRIPTION

This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 4310-18-7 ( OEM Part Number 465-017 ). This part is primarily made for a Cummins ISB 6.7L, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

Additional Notes: DEF Header, 40 MICRON, 18"

OEM NUMBERS

Primary OEM465-017
Additional OEM465-017

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490540378
WEIGHT8.00 LBS

SHIPPING OPTIONS

Ship Weight : 8.00 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.


The Hollingshead Mixer Cummins ISB 6.7L DEF Head Unit delivers precise control to your SCR system by metering DEF with pin-point accuracy, helping maintain clean emissions and optimal engine behavior under every condition. Built to OEM standards for rugged reliability and plug-and-play integration, it’s the trusted component that keeps your engine running compliant, smooth, and ready for the road—mile after mile.

PEOPLE ALSO ASKS | BLOG(S)

In today’s diesel world, the DEF (Diesel Exhaust Fluid) system is center stage in achieving emission compliance and avoiding engine derates. One of the critical components in that system for the Cummins ISB 6.7L platform is the DEF head—often called the mixer or dosing head—and the Hollingshead Mixer for Cummins ISB 6.7L (OEM 14487) is engineered to deliver that precision control. When your DEF head fails or begins to degrade, it puts your engine’s emissions control, diagnostics, and driveability at risk.

The Hollingshead Mixer DEF head (OEM 14487) is constructed to integrate seamlessly with Cummins ISB 6.7L systems, delivering consistent dosing, accurate sensor feedback, and longevity under tough conditions. Replacing a faulty or aging mixer head is a smart choice for diesel vehicle owners who want reliability, compliance, and peace of mind.

  • Ensures precise dosing of DEF into the exhaust stream—critical for proper SCR (Selective Catalytic Reduction) function

  • Compatible with OEM tolerances (OEM 14487), giving you factory-level fit and performance

  • Monitors fluid temperature and concentration, helping the engine management system make real-time adjustments

  • Prevents system faults and engine derates triggered by inaccurate readings or sensor errors

  • Built to resist corrosion, vibration, and thermal stress for durability in real-world use

  • Straightforward to install, reducing downtime and labor costs

Don’t let a failing DEF head compromise your vehicle’s emissions system or lead to unwelcome error codes. The Hollingshead Mixer Cummins ISB 6.7L DEF Head Unit (OEM 14487) gives you assurance that your emissions system is functioning correctly and efficiently. Invest in this critical component now, and you’ll keep your engine running cleaner—and stress-free—for the long haul.

The DEF (Diesel Exhaust Fluid) head unit plays a crucial role in monitoring fluid levels, quality, and temperature within a vehicle’s emissions system. Since DEF is sensitive to environmental conditions, temperature has a direct impact on the accuracy and reliability of the DEF head unit. Understanding these effects can help operators take steps to protect the system and avoid unnecessary downtime.

Ways Temperature Affects the DEF Head Unit

  • Freezing Conditions
    DEF begins to freeze at around 12°F (-11°C). Cold temperatures can cause frozen fluid or sensors, leading to inaccurate readings or temporary system shutdowns until the fluid thaws.

  • Overheating Risks
    Excessive heat may degrade DEF fluid quality, causing the sensors in the head unit to detect abnormal values. High heat can also damage internal electronics and wiring.

  • Sensor Sensitivity
    The DEF head unit relies on precise temperature sensors. Extreme hot or cold conditions can stress these sensors, increasing the likelihood of faults or diagnostic trouble codes (DTCs).

  • Crystallization Issues
    Temperature fluctuations may encourage DEF crystallization. These crystals can build up around sensors, interfering with accurate monitoring.

  • Storage and Environmental Exposure
    Vehicles stored outdoors in extreme climates face more frequent DEF head unit issues due to constant exposure to temperature swings.

Temperature is one of the most important environmental factors affecting the performance of a DEF head unit. By storing DEF properly, protecting vehicles from extreme weather, and monitoring fluid quality, operators can extend the life of the DEF system and keep their equipment compliant and reliable.

Clean only the external areas and nozzle tip with approved DEF-safe cleaner, avoiding internal disassembly.

Neglect can lead to clogging or degradation of dosing accuracy, which compromises emissions compliance and may force derate.

Crystallization can block the nozzle or interfere with spray pattern, resulting in improper dosing.

High heat environments, vibration, moisture intrusion, or using contaminated DEF accelerate component fatigue.

Cummins DEF Head Units

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