If you're looking for a 2017 6.7 delete kit, you've probably reached that point where the dash lights are driving you crazy and your fuel mileage isn't what it used to be. It's a common crossroads for truck owners. You love the power of that 6.7L engine, but the factory emissions equipment can feel like a heavy leash holding the truck back. Whether it's the constant DEF refills or the dreaded "exhaust filter full" message, there comes a time when you just want the truck to run like it was meant to.
Why People Think About Deleting
Let's be real for a second—the stock setup on a 2017 6.7 is pretty impressive from the factory, but it's also complicated. You've got the Diesel Particulate Filter (DPF), the Exhaust Gas Recirculation (EGR) system, and the Selective Catalytic Reduction (SCR) that uses Diesel Exhaust Fluid (DEF). When all these systems are working perfectly, they're great for the environment, but they aren't always great for the truck's longevity or your wallet.
The biggest headache is usually the DPF. It catches soot, and then the truck has to go into a "regen" cycle to burn that soot off. This process dumps extra fuel into the exhaust to crank up the heat. Not only does this kill your fuel economy, but it also puts a lot of stress on the engine components over time. If you do a lot of short trips or a lot of idling, that filter never gets hot enough to clean itself out, and that's when you end up at the dealership facing a massive repair bill.
What's Actually in a 2017 6.7 Delete Kit?
If you've started shopping around, you'll notice that a "kit" isn't just one single box with a silver bullet inside. It's usually a combination of a few different parts that work together to bypass those factory restrictions.
First, you've got the delete pipe or full exhaust. This replaces the bulky DPF and SCR sections of your exhaust system. Most guys go with a 4-inch or 5-inch straight pipe. Not only does it shed a ton of weight—seriously, that stock exhaust is heavy—but it also lets the engine breathe. You'll notice a much deeper growl and a bit more of that classic turbo whistle that everyone loves.
Next is the EGR delete. This part of the kit blocks off the system that recirculates hot, dirty exhaust gases back into your intake manifold. Over time, that soot builds up and creates a nasty sludge that can gunk up your valves. By blocking it off, you're making sure your engine is only breathing clean, fresh air. It helps the engine run cooler and keeps the oil cleaner for longer.
The most important piece of the puzzle, though, is the tuner. You can't just pull the hardware off and expect the truck to run. The computer (ECM) will freak out because it's looking for sensors that aren't there anymore. A good tuner tells the truck's brain, "Hey, it's okay that the DPF is gone," and adjusts the engine parameters to match. This is where you get your power gains and that bump in MPG.
Talking About Performance and MPG
One of the first things you'll notice after installing a 2017 6.7 delete kit is how much more responsive the throttle feels. Since the engine doesn't have to push exhaust through a literal ceramic brick anymore, the turbo spools up much faster. It feels like the truck just "woke up."
Then there's the fuel mileage. It's not uncommon to see a jump of 2 to 4 miles per gallon once the regen cycles are gone. If you drive a lot of miles for work or tow heavy trailers, those savings add up fast. You're also saving money by not having to buy DEF every couple of weeks. It's one less fluid to worry about and one less tank to keep filled.
The Installation Process
Is this something you can do in your driveway? Well, it depends on how handy you are with a wrench. Most of the exhaust work is straightforward bolt-on stuff, but those factory bolts can be a real pain if they've got some rust on them. You'll definitely want some penetrating oil and maybe a buddy to help you manhandle the old exhaust out of the way.
The EGR side can be a bit more tedious. It's cramped back there, and you'll need some patience to get everything lined up. The tuning is usually the easiest part—you just plug it into the OBDII port and follow the prompts on the screen. But honestly, if you aren't comfortable working on a modern diesel, there's no shame in taking it to a shop that knows these trucks inside and out. Just make sure you know the local rules before you go rolling into a mainstream mechanic.
The "Elephant in the Room" – Legal Stuff
We have to talk about it: deleting a truck is technically for off-road use only. The EPA has been cracking down on emissions tampering, and in many states, you won't pass an inspection if the equipment is missing. If you live in an area with strict smog testing, a delete might not be a viable option for a daily driver.
Also, it's worth mentioning that deleting your truck will almost certainly void your powertrain warranty. If you've got a 2017 that still has some factory coverage left, you're taking a risk. Most guys wait until the warranty is up before they pull the trigger, but some decide the benefits are worth the risk of paying for repairs out of pocket. It's a personal call, but one you should think about before you start unbolting things.
Long-Term Reliability
The main reason people stick with a 2017 6.7 delete kit is for the long-term health of the motor. By removing the systems that cause heat soak and soot buildup, you're generally extending the life of the engine. The oil stays golden for much longer because it's not being contaminated by exhaust gases, and the internal components don't have to deal with the extreme temperatures of a regen cycle.
That said, because you have more power at your fingertips, you have to be responsible. It's tempting to crank the tuner up to the "hot" setting and show off, but that puts extra stress on the transmission and the head bolts. If you treat the truck with respect and use the delete as a way to improve efficiency and reliability rather than just a way to race, that 6.7 Powerstroke can easily go for several hundred thousand miles.
Maintenance After the Delete
Once you've deleted the truck, your maintenance routine changes a little bit. You don't have to worry about DEF filters or DPF sensors anymore, which is great. However, you should still stay on top of your oil changes and fuel filter replacements.
Actually, fuel filters are even more critical on these 6.7 engines. The high-pressure fuel system is sensitive, and even though you've simplified the exhaust, you still want to make sure the fuel going into the engine is as clean as possible. I always tell people to stick with OEM filters—it's not worth saving twenty bucks on a cheap knock-off when you're protecting a multi-thousand-dollar fuel system.
Making the Decision
At the end of the day, picking up a 2017 6.7 delete kit is about making the truck work better for your specific needs. If you're tired of the "limp mode" scares and you want to see what that engine is actually capable of, it's one of the most popular paths to take.
Just do your homework. Look for reputable tuners and high-quality hardware. There are a lot of cheap kits out there that might save you money upfront but cause headaches with fitment or software glitches down the road. Investing in a solid setup from the start will save you a lot of frustration.
Your truck is a massive investment, and keeping it on the road for as long as possible is the goal. For many 2017 owners, getting rid of the emissions clutter is the best way to ensure that their 6.7 stays reliable, powerful, and fun to drive for years to come. Just remember to keep your old parts in the corner of the garage—you never know when you might need them again!