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OEM replacement aftermarket WELD BUNGS by Redline Emissions Products.

QUALITY. Every REP Weld Bung goes through an extensive inspection process to verify OEM performance, specifications, and fitment. REP Weld Bungs come with a 1-year warranty from the date of purchase*

SELECTION. Many aftermarket vendors cover the top movers, we go deeper!  We offer the most extensive parts offering in the emissions systems parts industry.

AVAILABILITY. REP stocks a multi-million dollar inventory spanning warehouses in the US and Canada to offer 1-to-3-day delivery of the parts you need to most locations.

PACKAGING. REP Weld Bungs are individually packaged in sturdy, see-through clamshell-type packages for better visibility, display, and organization. Each Weld Bung is clearly labeled with important part and OEM information.

TRAINING. Have questions?  We are here to assist with whatever product education, technical, and sales support you may need.

Weld Bungs by Redline Emissions Products

Most Popular Weld Bungs Kit from REPNEW WELD BUNG KIT (BK4522): Customers love this kit’s convenience and savings. Includes 3 each of the 15 best-selling REP weld bungs in a handy, labeled organizer.


We invite you to watch the video, download a product booklet, or just have a look around this page. See for yourself how REP Weld Bungs are a high-value addition to your parts business. Want to see if we have a particular bung or look up a part# cross reference, then try our OEM Search tool.

Redline Emissions Products® offers aftermarket OEM replacement weld bungs for sensor replacements located on DPFs & DOCs. No need to replace an entire DPF/DOC filter if a bung breaks during service.

Sizes of weld bungs we offer include: M10 x 1.25, M12 x 1.0, M12 x 1.25, M12 x 1.50, M14 x 1.00, M14 x 1.25, M14 x 1.50, M16 x 1.00, M16 x 1.50, M18 x 1.50, M20 x 1.50 and M22 x 1.50 – with many options and flares available.


One of the things that set REP Weld Bungs apart is their high level of quality. So, what does that mean?

Our extensive quality assurance process involves all weld bungs for proper thread size and pitch, making certain the threads are clean and debris free. All seats are checked for proper angle and hole size.

This provides peace of mind for resellers & distributors and reduces the chances of downtime because of a product failure due to quality issues.


Many aftermarket vendors just carry the top movers, we go way deeper! 

We offer the most extensive parts offering in the aftermarket emissions parts industry.

With over 48 SKUs and growing, REP Weld Bungs offer broad coverage for all your sensor port needs.

REP Weld Bungs cover a broad range of diesel vehicle applications.

Plus an easy-to-use website with the industry-leading OEM parts cross-search tool to help you find the right bung.

REP Weld Bungs in our showroom/warehouse
REP DPFs for most manufacturers/brands


Having a great selection is just one aspect of a healthy parts distribution model. Availability is key.

We have invested in providing strong and speedy availability of our great selection of Weld Bungs.

It helps no one if you need to wait a week or more for your part.

REP stocks multiple warehouses in the US and Canada to offer quick coast to coast, delivery of the parts you need, when you need them.

If the part is not on the shelf, you cannot sell it! REP maintains a multi-million-dollar inventory of aftertreatment parts to be your go-to supplier.

REP Availability Map

Note: Transit times were based on the information available at the time. Actual transit times vary based on many factors.


We believe sturdy packaging and clear, complete labeling are essential to serving you and your HD aftertreatment parts customers.

All REP Weld Bungs are packaged in see-through clamshell-type packages which allow your customers to see the product and confirm it is the correct part for the job. The clamshells further allow for easy and professional-looking product display in your parts department or sales floor.

All REP weld bung clamshells are labeled with the REP part number and thread/seat information, again to assist you and your customer in getting the part needed.


Emissions systems are complex; we help take the mystery out of them through training and education! 

We can provide product-specific and aftertreatment systems training for your salespeople. Boost your customer service and profits by having a more knowledgeable and confident parts and sales staff.

REP offers Industry-specific training for your service and parts team. Areas include product-related training, diagnostic support, technical support, and best practices for “finding the right part”

REP Training Options
In summary, REP offers high-quality, OEM spec WELD BUNGS for all types of applications that are available nationwide from multiple warehouses.
Interested in learning more about our array of REP Weld Bungs, or becoming a REP distributor?
Click the links below.
REP Weld Bungs provide quality, selection, availability, packaging and training

Ready to start selling Weld Bungs?


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Any questions about REP Weld Bungs?

CALL 1-888-295-4670

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