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Description
Diesel Oxidation Catalyst (DOC) | High-Efficiency Emission Control & Durable Performance for Heavy-Duty Engines Diameter 170mmProduct Introduction Product name Diesel Oxidation Catalyst Model DOC Catalyst Euro 5(Euro3 4 5) PT 10gr ft Euro 6 PT 20gr ft Cpsi 300 400 Customization Support Error 0. 1mm Quality High standard Package Neutral packaging Price includes 1 pcs DOC +1 pcs Insulation Materials Sellers Notes Checklist Important things 1 This product is suitable for highway diesel vehicles with good vehicle condition and normal exhaust temperature. 2 Usually PT 10gr ft PT
Product Introduction
| Product name | Diesel Oxidation Catalyst | Model | DOC Catalyst |
| Euro 5(Euro3/4/5) | PT/10gr ft³ | Euro 6 | PT/20gr ft³ |
| Cpsi | 300/400 | Customization | Support |
| Error | ±0.1mm | Quality | High standard |
| Package | Neutral packaging | Price includes |
1 pcs DOC +1 pcs Insulation Materials |
Sellers’ Notes Checklist
Important things |
|
|---|---|
|
1 |
• This product is suitable for highway diesel vehicles with good vehicle condition and normal exhaust temperature. |
|
2 |
• Usually PT/10gr ft³/PT/20gr ft³ corresponds to the original vehicle size of the emission standard, which is enough to achieve the corresponding emission effect. Since ours is a replacement product, not the original, there is a difference in precious metal content with the original DOC. If you mind this situation, don't pay. |
|
3 |
• If you have any requirements for PD, RH, Or there are higher requirements for precious metal content • Please contact us. |
|
4 |
• For non-road equipment, the engine exhaust temperature is relatively low, such as generators/mining equipment, etc. It needs to be judged based on factors such as working environment/power/exhaust temperature, please contact us. |
|
5 |
• We have super stock, PT/5gr ft³/PT/10gr ft³/PT/15gr ft³/PT/20gr ft³/PT/30gr ft³/PT/60gr ft³......Bulk purchase customers please contact us privately to apply for order discounts |
| Product link is the price of a single sample | For bulk purchases, please contact our staff | |
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Product Specifications
| Picture | Description and Specifications |
|---|---|
|
The Diesel Oxidation Catalyst (DOC) is a device installed inthe engine exhaust line to convert carbon monoxide (CO)and hydrocarbons (HC) in the enginèexhaust into harmlesswater (H20) and carbon dioxide (CO2) through oxidationreactions.
Formula: 2CO+O2--2CO2 CxHy+(x+4y)O2--xCO2+2yH2O |
Fast facts
1.Converts carbon monoxide (CO) into carbon dioxide (CO2) and water
2.Can eliminate muffler requirement
3.Harmful particulates are oxidised into harmless products
What are the strengths of our solution?
Our DOCs provide a simple solution for original equipment manufacturers (OEMs). They’re easy to install and maintain and don’t require any additional control from the machine operator. In many cases, the need for a muffler can be eliminated, and our DOCs can also allow for a wider ratings envelope. Concentrations of NO and NO2 can be optimised in the exhaust stream, and if your engine has SCR, this will make it more efficient and reduce diesel exhaust fluid (DEF) consumption requirements. Using a DOC also enables additional passive regeneration in DPF systems.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
Price
Size: 50 sqft
Priced well . Good quality
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Reviewed in the United States on February 26, 2026
★★★★★ 5
Accurate size.
Size: 50 sqft
item as descibed
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Reviewed in the United States on February 21, 2026
★★★★★ 5
Reduce sound vibrations in your car! Works great! This is not sound proofing, it is Sound Deadening
Size: 10 sqft, Size: 10 sqft
This Butyl rubber sound proofing kit includes nine 15 1/2" x 10" peel and stick panels. It really is a lot of coverage, but I still will need a second box to finish my car doors. The instructions are easy to follow and the only tools you need are scissors or a knife and a small roller, but you could get away with using a pan scraper to press the product down. You may need paper and a pen to make a template for certain areas, though. I used some cardboard from my recycle bin to cut template pieces for the hard to see areas inside my doors. This is fairly easy to install once you have it cut into pieces, just peel the backing off and stick it on. Be very careful to not let it stick to itself, as it will be nearly impossible to separate. This stuff is crazy sticky! No worries about it coming off once you've stuck it to your car.
To add this to your car doors, you will have to remove the interior door panels, but there are lots of YouTube videos on how to do this on all sorts of cars.
Note that is is sound deadening material - Not sound proofing! You do not need to cover 100% of the car with this. The material is designed to stop noise from resonating through metals, so even one piece of this on a large area of sheet metal will stop the sound vibrations quite a bit. I am covering about 80% of my car doors with it, then planning to put sound proofing on top of it. This sound deadening material needs to come in contact with the metal surfaces to stop the sound vibrations, so it would not be very helpful to put it on top of sound proofing material.
Also note that the installation requires temperatures above 50° Fahrenheit. Since it is winter, I've warmed up my garage while working on this project. In low temps, the sticky stuff would probably have trouble adhering to cold metals. So far I have tested just having it on my front doors, but I already can hear the difference. This soundproofing definitely does minimize road noise and external sounds from getting inside your car. It also stops music vibrations, so my radio now sounds clearer than it did before. I don't plan to pull out my vehicle carpet to install on the floor, but I would imagine that if I did it would greatly reduce the road noise even more.
Definitely five stars on this product!
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Reviewed in the United States on January 17, 2026
★★★★★ 5
Quality mats that provide noticeable noise suppression
Size: 10 sqft
I used these mats when I replaced the carpet in my Chevy Tahoe. Cutting the mats to size was easy enough with a utility knife and a straightedge. The adhesive backing stuck fairly well, but I used a roller to press the mats into place on the metal panels, which seemed to help them adhere a little better. Under the old carpet was the type of insulation you'd typically see under carpet in a typical home. It was worn, so I tossed it and installed the new carpet directly over these new mats. The before & after difference in noise was minimal, but noticable. But I only installed them on the floor - not in the doors, rear hatch area, firewall, or roof. So overalll, I'm pleased with these mats as they provided the noise suppression that I had expected.
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Reviewed in the United States on March 20, 2026
★★★★★ 5
Easy to cut and easy to install
Size: 10 sqft, Size: 10 sqft
You receive 9 sheets of RUNSUNSPRII Car Sound Deadening Mat that each measure 9.75" x 15.75". This calculates to a total of 9.6 square feet in total for all of the sheets. Of all the different styles of sound deadening mats, foil lined butyl is the best type for eliminating vibration. This quality product has a printed gridwork of 2-inch squares on the liner to aid in cutting the correct sized pieces.
Even with as sticky as this product is, it is super easy to cut to shape with one pass of a razor blade. OEM auto manufacturers use this same kind of product extensively on the inner structure for sound deadening and to block sound and air transmission through all sizes of holes and cutouts. Because it is highly waterproof, it also is perfect for blocking areas to prevent water intrusion. The very sticky pads adhere to all surfaces and are very flexible and will conform to fit many areas. Because it is thin, it is ideal to install under interior trim panels without causing interference with how the panels fit.
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Reviewed in the United States on January 26, 2026