Ford’s 6.7 Powerstroke replaced the 6.4 Powerstroke in 2011 due to stricter emissions requirements for diesel trucks. Since its release it has had three different generations, each of which has continued to become more emissions friendly. However, 6.7 Powerstroke emissions systems tend to be common failure items and are very expensive to repair.
While the diesel particulate filter and other emissions systems are great at reducing emissions, they do have a few downfalls. First, the DPF system is prone to clogging. Secondly, it creates a lot of backpressure in the exhaust system which is bad for performance and the health of the turbo, which is a common 6.7 Powerstroke problem already. Lastly, if the DPF system fails it can cost $3k-$5k to replace it.
For these reasons, deleting the 6.7 Powerstroke DPF system is common. This guide is going to walk through the DPF system, the pros and cons of deleting it, and what DPF delete kits you’ll need to remove the system.
What is a 6.7 Powerstroke DPF System?
DPF is the diesel particulate filter. When diesel fuel is burned it releases diesel particulates into the exhaust system. Diesel particulates are tiny particles that contain tons of different chemicals which are harmful to both the atmosphere and human health when ingested. The DPF is a filter that captures these diesel particulates and then burns them through a regeneration cycle.
The DPF is actually the 3rd emissions component in the 6.7 Powerstroke exhaust system. First is the diesel oxidation catalyst, or DOC, which bolts directly the the downpipe and is essentially a catalytic converter. Second is the selective catalytic reduction, or SCR, system. The SCR system uses diesel exhaust fluid (DEF) to turn nitrous oxide into nitrogen gas and water vapor. After the exhaust gases are burned down as much as possible through the first two systems, they then enter the DPF system.
The other noteworthy emissions system to mention is the EGR system. EGR, or exhaust gas recirculation, occurs before the gas enters the exhaust system. After combustion takes place the EGR system recirculates exhaust gas back into the intake system so that it can be re-burned to further reduce emissions.
What Does Deleting the DPF System Remove?
DPF deletes are somewhat complicated since the DPF is only one of four actual emissions systems. However, a typical DPF delete kit will actually delete the DOC, SCR, and DPF systems. On consumer pickups the SCR and DPF system are integrated into the same pipe. Chassis cab work trucks have the DPF integrated into the DOC and the SCR system is separate.
So, deleting the 6.7 Powerstroke DPF will remove:
- Diesel oxidation catalyst (DOC)
- Diesel particulate filter (DPF)
- Selective Cat Reduction (SCR)
- Diesel exhaust fluid (DEF)
Since the DEF fluid is only needed for the SCR system, once the SCR system is deleted it is no longer needed. You can either completely remove the DEF tank or just plug it and leave it in place.
A DPF delete kit is essentially just one piece of exhaust piping. It bolts up to the downpipe and to the muffler and delete all of the emissions components in between.
Does a DPF Delete Remove 6.7 Powerstroke EGR?
A DPF delete does not remove the EGR system. The EGR system needs to be deleted separately.
Since a DPF delete is purely a straight pipe, or race pipe for the exhaust system it does not impact EGR. The EGR system occurs before the exhaust system and is comprised of an EGR valve and an EGR cooler. When the EGR valve is open exhaust gases flow to the EGR cooler and then back into the intake system.
Deleting the EGR system on a 6.7 Powerstroke is slightly more complicated and labor intensive since it requires plugging the EGR valve and replacing some hoses. On the otherhand, a DPF delete just requires unbolting a portion of the exhaust and bolting the DPF delete pipe on.
EGR Delete Kits
As discussed, the EGR is deleted separately which means you also need a kit to delete this. You can opt for a complete emissions delete kit, which includes the EGR and DPF deletes plus comes with a tuner pre-loaded with delete tunes. Or you can purchase the kits separately.
Individual EGR Delete Kits
Complete Delete Kits
6.7 Powerstroke DPF Delete Pro’s
The two main reasons to delete the 6.7 Powerstroke DPF are for reliability and performance. The DPF system is prone to clogging and failing and a brand new OEM replacement system costs about $4k. Additionally, it reduces the turbochargers reliability, and the turbo is a common failure item. Secondly, it creates a lot of back pressure which is bad for the turbo and reduces engine performance.
Here are the benefits of deleting the DPF:
- 30-100+hp gains (with a tune)
- 2-5mpg increase
- Reduced exhaust backpressure
- More reliable and efficient turbo
- No more regen or need for DEF fluid
- Increased reliability and lower maintenance costs
- You can sell your OEM system for $$$
Deleting the DPF system requires a tune. Therefore, power gains will mostly depend on what tune you are running. However, even on a modest tune you will still experience solid gains.
The other benefits are all centered around reliability and reducing maintenance costs. You’ll save money at the pump by not needing DEF fluid. Additionally, SCR pumps diesel fuel into the exhaust system which hurts gas mileage, so you’ll see some nice mpg gains with it deleted. And lastly, you’ll prevent yourself from costly repairs if the DPF system clogs or fails.
6.7 Powerstroke DPF Delete Con’s
Deleting the DPF system is great for power, maintenance, and operating costs. However, it’s not so great for emissions, warranty, resale value, and a number of other things.
- Decreased resale value (have to sell private or reinstall OEM equipment)
- Install must be DIY’d
- Lose all factory warranty and dealership may refuse to work on your truck
- It is illegal and will not pass emissions
- It’s harmful for the environment
- Requires a tuner which makes it a bit more expensive
The EPA is getting very serious about emissions tampering. Because of this you’re probably not going to find a shop who will install a delete for you. Additionally, you might even find a few who won’t work on your truck at all. Outside of this you will lose any warranty you might have.
Other considerations are resale value and cost of deleting the system. It does require a DPF-capable tuner which can add $500+ to the cost. And it will hurt resale value if you try to sell it without putting the OEM equipment back on. If you don’t, it will have to be registered in a no emissions county or state which will impact the number of interested private buyers.
Should You Delete the 6.7 Powerstroke DPF System?
The power gains, MPG improvements, and peace of mind sound great. However, the downsides are pretty substantial as well. We generally do not recommend deleting your DPF system unless you are chasing crazy power gains, or have a failed DPF that you don’t want to spend $5k fixing.
If you aren’t in either of these situations then deleting the 6.7 Powerstroke DPF causes headache. Inspections, repairs, etc. become more challenging and there are some serious fines for getting caught with deleted emissions systems, including having your truck crushed.
If you do want to delete it, I suggest keeping your stock DPF system. Selling it for $2k might sound appealing, but being able to swap it back onto the truck is important if you ever want to sell it or have issues with inspections and repairs.
Deleting the EGR system is a bit more of a headache since it’s more challenging to undo.
How to Delete the 6.7 Powerstroke DPF System
Two things are required for a DPF delete:
- 6.7 Powerstroke DPF Delete Kit
- DPF Delete Tuner
DPF delete kits are simply exhaust pipes which makes them pretty simple. However, there are a few options ranging from just the delete pipe, to a full exhaust system. The second key component is a tuner that is capable of tuning-out the various sensors and turning off regeneration.
1) DPF Delete Kit
The portion of the exhaust that has to get deleted is the part from the downpipe to the muffler. It’s a simple bolt-on and mostly doesn’t require any cutting or modifying. Since it’s one simple pipe, these kits are pretty cheap and cost somewhere around $300.
Alternatively, you can get a DPF delete kit that replaces the whole 6.7 Powerstroke exhaust system. This kit will bolt up directly to the downpipe again but will also replace the muffler and back portion of the exhaust system. These kits are made in 4″ and 5″ sizes and are usually straight-pipes. This is a great option for anyone who wants to delete the DPF and add a “cat-back” exhaust system to their truck.
The one note with a full downpipe-back exhaust system is that they are generally a good bit louder since it deletes the muffler. If you opt for the cheaper route getting just the DPF delete pipe only you won’t notice too much of a sound increase since the muffler will still remain in place.
Best Delete Kit: Diesel Dudes 6.7 Powerstroke Complete Delete Kit
Delete tunes will also render the EGR system useless, so we usually recommend going with a complete delete kit and removing the DPF and the EGR. Diesel Dudes offers great complete packages that come with both delete kits and a tuner that is pre-loaded with the necessary delete tunes. They also offer the dpf deletes are separate kits and you can get one that is either just the delete piping, or with a full 4″ downpipe-back exhaust system.
Individual Delete Kits/Exhaust Delete Kits can be bought here: 6.7 Powerstroke DPF Delete Kits
2) DPF-Capable Tuner
Not all 6.7 Powerstroke tuners on the market are capable of tuning a deleted Ford. So, you’ll need to get one capable of handling a deleted truck. Fortunately, the majority of the big name brand tuners are capable of handling this BUT you will need custom tunes. Tuner companies no longer sell their tuners with pre-loaded delete tunes, so you will need to purchase from a company like Diesel Dudes to get tuners that are pre-loaded.
Tuning is required since the DPF system has a number of emissions related sensors that get removed with delete kits. These sensors control various emissions related things like regeneration and so on. Therefore, for your truck to function properly a tune needs to be added so that these items can be tuned-out. If you don’t have a tune, your Powerstroke will throw a bunch of check engine lights and likely run into some performance and driveability issues.
Tuners are rather expensive so unfortunately, this adds about $700-$1,500 to the cost of deleting the 6.7 Powerstroke DPF. The two best on the market are H&S Mini Maxx and the BullyDog BDX.
Buy them here with pre-loaded delete tunes:
6.7 Powerstroke DPF Delete Summary
There are 4 primary emissions systems on the 6.7 Powerstroke: EGR, DOC, SCR, and DPF. A “DPF delete kit” refers to deleting the DOC, SCR, and DPF emissions systems, which are all components in the exhaust system. Deleting the DPF system is popular for performance gains, gas mileage improvements, and better reliability.
The DPF system is prone to clogging and failure and can cost near $5k to replace it when it fails. Additionally, it creates a lot of backpressure in the exhaust system which hurts the efficiency and reliability of the turbocharger. Therefore, deleting the 6.7 Powerstroke DPF is a great option for performance and reliability.
However, a DPF delete does cause some headaches. It is illegal from an emissions perspective which can create problems with registration and inspection. Additionally, you will need to DIY the delete kit install and might have trouble finding people willing to work on your truck once it’s deleted.
Deleting requires two things: a delete kit, and a tuner. Delete kits range from $250-$750 depending on whether you want a full downpipe-back exhaust system or just the DPF pipe. Tunes run in the ballpark of $750 which makes a full DPF delete around $1,000-$1,500.