6.7 Powerstroke DPF Back Exhaust: Worth It or Not?

In diesel engines, the diesel particulate filter (DPF) is a rather newer addition. This exhaust filter is highly eco-friendly which is why governments are so strict about its inclusion in modern vehicles.

But is a 6.7 Powerstroke DPF back exhaust worth it for your vehicle? Absolutely yes, but not in terms of engine performance and efficiency. To be honest, DPF actually limits your engine performance.

This filter’s value lies within its ability to turn your vehicle emissions as environment-friendly as possible by filtering soot from it. And it’s particularly important in this existence-threatening era of climate change and global warming.

In this article, I’ll discuss what DPF is and how it affects your vehicle. By the end of it, you’ll clearly understand if DPF is necessary or not for your Powerstroke-powered vehicle.

What is Soot and How Is It Bad?

Soot generates due to the incomplete combustion of carbon-based fuels like diesel, gasoline, etc. It is a black or brownish-black substance composed primarily of tiny, fine carbon particles.

When fuel burns, it undergoes a chemical reaction to produce energy, carbon dioxide (CO2), water vapor, and other combustion byproducts.

However, non-ideal factors like insufficient oxygen supply or improper fuel-air mixture, do not let the combustion process complete. As a result, soot particles are formed.

Soot particles are extremely bad for the environment for various reasons. It constantly pollutes the air and causes long-term respiratory diseases.

When deposited on surfaces, it can discolor and corrode buildings, vehicles, and infrastructure.

Also, soot is a heat-trapping substance that actively takes part in global warming. So, controlling its emission is quite essential.

How Does DPF Help?

The Diesel Particulate Filter (DPF) is an emission filtration device used in diesel engines, commonly found in Ford vehicles. It is specifically designed to filter soot and ash from the exhaust gases of the engine.

How does it do that?

By trapping the soot using catalytic reaction from the exhaust gases passing through the filter.

It is located at the back of the vehicle, right in the way of passing emissions, and consists of a ceramic honeycomb structure with tiny channels or cells. The walls of these channels are coated with a special catalyst that makes this filtration process happen.

Although technological improvement has been able to reduce soot emissions from modern engines, a modern diesel engine emits 30 to 100 times more soot than a gasoline engine without the DPF.

So, blocking soot emissions from diesel engines is a priority and normally, wall-flow DPFs can clear soot from emissions at an 85 to 100% efficiency rate, which is very impressive.

6.7 Powerstroke DPF Back Exhaust: Good Sides vs Bad Sides

The DPF can be compared to a double-edged sword. On one hand, it keeps the atmosphere clean, but on the other, it does so by limiting your vehicle’s performance and fuel efficiency.

Let’s take a look at the pros and cons of the DPF back exhaust below –

Pros of 6.7 Powerstroke DPF Back Exhaust

  • This feature comes built-in with the vehicle, so you don’t need to pay extra to get the filter.
  • The filter is highly efficient at blocking soot which is greatly beneficial for the environment.
  • The 6.7 Powerstroke’s DPF is equipped with sensors and monitoring systems that provide valuable information about the engine’s condition and performance.  
  • Diesel engines, including the 6.7 Powerstroke, must meet stringent emission standards set by regulatory authorities. The DPF aids in achieving compliance with these standards.
  • The DPF system in most modern diesel engines, including 6.7L Powerstroke, uses a regeneration system. Using the exhaust gas temperature, the filter burns off accumulated soot and helps to keep itself clean and clog-free.

Cons of 6.7 Powerstroke DPF Back Exhaust

  • The regeneration system can’t clean the filter entirely, so the DPF will need proper manual cleaning from time to time. It can be cumbersome if done alone and a bit costly if done with professionals.
  • A 6.7L Powerstroke with DPF will run at normal capacity only when the filter is clean. Accumulated soot will surely restrict the exhaust airflow which will limit engine performance. And the more clogged the filter the poorer the performance.
  • If the exhaust temperature doesn’t reach regeneration temperature manually, the ECU adjusts the engine’s combustion system to increase the exhaust gas temperature. This is called active regeneration and it draws significant power from the engine, which reduces the engine performance during the process.
  • Active regeneration requires injecting and burning more fuel than necessary in the combustion chamber to meet the increased demand for heat. This reduces the fuel efficiency of the engine greatly.

While the component has some limitations, its benefits outweigh them. Also, the inconveniences are rather insignificant for casual car drivers and manageable for drivers who use their trucks for business purposes.

Bypassing 6.7 Powerstroke DPF: Installing DPF Delete Kit

Yes, bypassing the DPF system is possible by simply installing a DPF delete kit. A DPF delete kit refers to a set of aftermarket components designed to remove DPF with a direct exhaust system.

A DPF delete kit will remove the restriction on your engine imposed by the DPF and let the engine function to its full capacity. You will get better fuel efficiency and consistent performance from your 6.7 Powerstroke.

But installing this kit isn’t worth it if you aren’t involved in off-road or racing activities. Here are the reasons why –

  1. Firstly, installing DPF delete kit for 6.7 Powerstroke or other DPF pre-fitted is completely illegal in most countries. You’ll be fined a lot of money if the authority finds you driving a DPF-deleted vehicle on the road.
  2. You’ll constantly pollute the environment as the emissions are not filtered and regulated at all.
  3. While most of the soot will escape through the direct exhaust line, some will cling to the line’s wall. And over time, the pipe will get clogged by soot accumulation, which is way more difficult and pricier to clean compared to a DPF.
  4. You will most definitely lose your parts warranty and insurance claims over this kit.

Bypassing the DPF actually has more issues than gains for you if you only use your vehicle for commuting or transporting. It’s legal to do off-road activities and racing with a DPF delete kit installed and you’ll probably require the additional performance boost and consistency for these activities.

So, unless you’re in such activities, installing a DPF delete kit is not worth the risk and hassle. If you think to delete/removing DPF from your 6.7 Powerstroke engine, then you will face DPF deleting problems.


Why would someone consider a DPF delete?

Some individuals consider a DPF delete to gain perceived benefits such as increased engine performance, improved fuel efficiency, and reduced maintenance costs.

But as DPF delete kits are illegal for on-road applications in many countries, people mainly install the delete kit when they exclusively use the vehicle for off-road activities.

Can I install a performance-oriented DPF instead of deleting it?

Performance-oriented DPFs are not a common option. DPFs are highly regulated and must meet specific emission standards. It is crucial to comply with local emissions regulations, and using non-compliant DPFs can result in legal consequences.

Can I use additives or fuel treatments to clean the DPF?

It is generally not recommended to use additives or fuel treatments to clean the DPF. The DPF regeneration process and proper maintenance, such as using high-quality diesel fuel, are typically sufficient to keep the DPF clean and functioning properly.

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