I've owned my 2015 Ram 3500 for about six years now, and it's been a solid truck. The 6.7L Cummins is legendary for a reason—it's tough, reliable, and pulls like a freight train. But like every modern diesel, it comes with emissions equipment that has real downsides.
The DPF on these trucks works, but it works at a cost. Backpressure that fights your turbo. Regeneration cycles that burn fuel you'd rather use for moving. And eventually, a filter that fills with ash and needs expensive replacement.
I spent a lot of time researching options before I finally pulled the trigger on a DPF delete pipe from TruckTok. After running it for about a year now, I wanted to share what I learned for anyone else considering this mod.
The Problem with the Factory DPF
The Diesel Particulate Filter is a ceramic wall-flow filter that traps soot from the exhaust. It's effective at cleaning emissions, but it creates restriction. Your turbo has to push exhaust through that filter, which increases backpressure and makes the engine work harder than it needs to.
Every few hundred miles, depending on your driving, the truck goes into regeneration. It injects extra fuel late in the combustion stroke to raise exhaust temperatures and burn off the trapped soot. That fuel does nothing to move you down the road. It's purely for cleaning the filter.
Over time, ash builds up in the DPF permanently. Soot burns off during regen, but ash doesn't. It's the non-combustible residue from engine oil additives, and it accumulates until the filter is eventually full. Around 150,000-200,000 miles, that ash load gets high enough that the DPF needs cleaning or replacement. That's a $2,000-$3,000 expense waiting to happen.
Why I Chose TruckTok
I'd seen TruckTok's name pop up in a few Cummins forums. The feedback was generally positive, and their prices were reasonable compared to some of the bigger names.
Their 4" DPF delete pipe caught my attention for a few reasons.
First, the 4-inch diameter is the sweet spot for the 6.7L. It's big enough to eliminate the backpressure restriction without being so large that it hurts exhaust velocity. The engine can breathe freely, and the turbo spools the way it should.
Second, it comes with a muffler. A lot of delete pipes are straight-through race pipes that are loud and drone on the highway. I wanted the performance gains without the noise. This one is designed for competition applications but includes a muffler for a more refined exhaust note.
Third, it's made from T-409 stainless steel. That's the right material for exhaust—it handles heat well and resists corrosion without costing as much as T-304. It'll last as long as the truck.
What the TruckTok Pipe Does
The pipe replaces the entire factory DPF and catalytic converter assembly from the downpipe back. It bolts directly to the factory turbo outlet and runs to the tailpipe area.
With the DPF removed, exhaust flows freely. No more forcing gas through a ceramic filter. No more backpressure fighting your turbo.
The 4-inch diameter matches what most tuners recommend for the 6.7L. It flows enough for stock or mildly modified trucks and leaves room for future upgrades.
The included muffler keeps the noise in check. It's not as quiet as the factory setup, but it's not obnoxious either. Highway drone is minimal, and you can still have a conversation without raising your voice.
What You Gain After Installation
After installing the pipe and getting a proper tune, the differences were immediately noticeable.
Better throttle response: The turbo spools faster without having to push exhaust through a restriction. The truck feels livelier off the line and responds quicker when you step on it.
Lower EGTs: With exhaust flowing freely, temperatures under load dropped significantly. Towing my trailer up grades, I saw EGTs about 150-200°F lower than before. That's less stress on the engine and turbo, which means longer life.
Fuel economy improvement: This was the biggest surprise. No more regen cycles burning fuel. My average MPG went up by about 4-5 miles per gallon. The product description mentions going from 13-14 MPG to 18-19 MPG, and that's been pretty accurate for my truck. It adds up fast when you're driving regularly.
No more regen anxiety: I don't think about regenerations anymore. No watching the dash, no worrying about interrupting a cycle when I shut the truck off. It's one less thing to stress about.
Eliminated a future expense: That $2,000-$3,000 DPF replacement that was coming at 150,000 miles? Not an issue anymore.
Common Questions
Is it loud?
With the muffler, it's not bad. It's deeper than stock and you can hear the turbo more, but it's not annoying on the highway. The muffler tames the exhaust note without restricting flow. If you want quiet, this is the way to go.
Do I really need a tuner?
Absolutely. The pipe alone won't work. The truck's computer monitors the DPF system using sensors for differential pressure, exhaust temperature, and soot load. When it detects the DPF is missing, it will set codes, light up your dash, and derate power.
You need a delete tune to disable that monitoring and optimize the engine for the new exhaust flow. TruckTok recommends their Mini Maxx tuner, which is a solid choice for the 6.7L Cummins. It's user-friendly and has good support. Without a tune, the hardware is useless.
Will it pass inspection?
This is for off-road use only. In states with emissions testing, a deleted truck won't pass. Know your local laws before buying.
Does it fit my truck?
Fits 2013-2018 Ram 2500 and 3500 with the 6.7L Cummins. Two important exceptions: it's not suitable for commercial cab and chassis trucks, and it won't work on trucks with air suspension. Check your setup before ordering.
What's in the box?
The pipe, clamps, and hardware. Everything you need for installation.
How hard is it to install?
It's straightforward if you're comfortable with exhaust work. The factory DPF is heavy and awkward, so having a second person or a jack helps. Expect to spend a few hours on it. The TruckTok pipe fit perfectly on my truck—no modification needed, no fighting to get things aligned.
Will it affect my transmission?
Not directly, but the increased power can affect shift points. A good tuner will adjust transmission parameters to match the new power levels.
Can I add more power later?
Yes. The 4-inch pipe gives you room to grow. If you add bigger injectors or a turbo later, you won't need to upgrade the exhaust again.
Is the fuel mileage gain real?
Yes, but it depends on your driving. The product description mentions going from 13-14 MPG to 18-19 MPG. That's been accurate for my mixed driving. If you have big tires or a heavy foot, your results may vary, but the improvement is real.
The Installation Reality
Installing a DPF delete pipe is a straightforward job if you have basic mechanical skills and the right tools. The factory DPF is heavy, so having a second person or a transmission jack makes removal much safer.
The TruckTok pipe fit perfectly on my truck. No modification needed, no fighting to get things aligned. Everything lined up the first time.
Plan for a few hours in the driveway. Most of that time is spent removing the factory components and getting everything positioned correctly.
The Verdict
The 2013-2018 6.7L Cummins is a fantastic engine, but the factory DPF system holds it back. It adds backpressure, wastes fuel on regens, and comes with an expensive replacement timeline.
The TruckTok 4" DPF Delete Pipe with muffler solves all of that. It lets the engine breathe, lowers EGTs, improves fuel economy by 4-5 MPG, and eliminates a future expense. And with the muffler, you get the performance without the drone.
Paired with a proper tune from a Mini Maxx or similar tuner, this is one of the best upgrades you can make to a 6.7L Cummins. The power gains are real, the fuel savings add up, and the truck just drives better.
If you're on the fence about deleting your 6.7L, this pipe is worth a serious look. It transforms how the truck feels and performs.
If you've deleted the DPF on your 6.7L Cummins, what was your experience? Drop your thoughts below.
The DPF on these trucks works, but it works at a cost. Backpressure that fights your turbo. Regeneration cycles that burn fuel you'd rather use for moving. And eventually, a filter that fills with ash and needs expensive replacement.
I spent a lot of time researching options before I finally pulled the trigger on a DPF delete pipe from TruckTok. After running it for about a year now, I wanted to share what I learned for anyone else considering this mod.
The Problem with the Factory DPF
The Diesel Particulate Filter is a ceramic wall-flow filter that traps soot from the exhaust. It's effective at cleaning emissions, but it creates restriction. Your turbo has to push exhaust through that filter, which increases backpressure and makes the engine work harder than it needs to.
Every few hundred miles, depending on your driving, the truck goes into regeneration. It injects extra fuel late in the combustion stroke to raise exhaust temperatures and burn off the trapped soot. That fuel does nothing to move you down the road. It's purely for cleaning the filter.
Over time, ash builds up in the DPF permanently. Soot burns off during regen, but ash doesn't. It's the non-combustible residue from engine oil additives, and it accumulates until the filter is eventually full. Around 150,000-200,000 miles, that ash load gets high enough that the DPF needs cleaning or replacement. That's a $2,000-$3,000 expense waiting to happen.
Why I Chose TruckTok
I'd seen TruckTok's name pop up in a few Cummins forums. The feedback was generally positive, and their prices were reasonable compared to some of the bigger names.
Their 4" DPF delete pipe caught my attention for a few reasons.
First, the 4-inch diameter is the sweet spot for the 6.7L. It's big enough to eliminate the backpressure restriction without being so large that it hurts exhaust velocity. The engine can breathe freely, and the turbo spools the way it should.
Second, it comes with a muffler. A lot of delete pipes are straight-through race pipes that are loud and drone on the highway. I wanted the performance gains without the noise. This one is designed for competition applications but includes a muffler for a more refined exhaust note.
Third, it's made from T-409 stainless steel. That's the right material for exhaust—it handles heat well and resists corrosion without costing as much as T-304. It'll last as long as the truck.
What the TruckTok Pipe Does
The pipe replaces the entire factory DPF and catalytic converter assembly from the downpipe back. It bolts directly to the factory turbo outlet and runs to the tailpipe area.
With the DPF removed, exhaust flows freely. No more forcing gas through a ceramic filter. No more backpressure fighting your turbo.
The 4-inch diameter matches what most tuners recommend for the 6.7L. It flows enough for stock or mildly modified trucks and leaves room for future upgrades.
The included muffler keeps the noise in check. It's not as quiet as the factory setup, but it's not obnoxious either. Highway drone is minimal, and you can still have a conversation without raising your voice.
What You Gain After Installation
After installing the pipe and getting a proper tune, the differences were immediately noticeable.
Better throttle response: The turbo spools faster without having to push exhaust through a restriction. The truck feels livelier off the line and responds quicker when you step on it.
Lower EGTs: With exhaust flowing freely, temperatures under load dropped significantly. Towing my trailer up grades, I saw EGTs about 150-200°F lower than before. That's less stress on the engine and turbo, which means longer life.
Fuel economy improvement: This was the biggest surprise. No more regen cycles burning fuel. My average MPG went up by about 4-5 miles per gallon. The product description mentions going from 13-14 MPG to 18-19 MPG, and that's been pretty accurate for my truck. It adds up fast when you're driving regularly.
No more regen anxiety: I don't think about regenerations anymore. No watching the dash, no worrying about interrupting a cycle when I shut the truck off. It's one less thing to stress about.
Eliminated a future expense: That $2,000-$3,000 DPF replacement that was coming at 150,000 miles? Not an issue anymore.
Common Questions
Is it loud?
With the muffler, it's not bad. It's deeper than stock and you can hear the turbo more, but it's not annoying on the highway. The muffler tames the exhaust note without restricting flow. If you want quiet, this is the way to go.
Do I really need a tuner?
Absolutely. The pipe alone won't work. The truck's computer monitors the DPF system using sensors for differential pressure, exhaust temperature, and soot load. When it detects the DPF is missing, it will set codes, light up your dash, and derate power.
You need a delete tune to disable that monitoring and optimize the engine for the new exhaust flow. TruckTok recommends their Mini Maxx tuner, which is a solid choice for the 6.7L Cummins. It's user-friendly and has good support. Without a tune, the hardware is useless.
Will it pass inspection?
This is for off-road use only. In states with emissions testing, a deleted truck won't pass. Know your local laws before buying.
Does it fit my truck?
Fits 2013-2018 Ram 2500 and 3500 with the 6.7L Cummins. Two important exceptions: it's not suitable for commercial cab and chassis trucks, and it won't work on trucks with air suspension. Check your setup before ordering.
What's in the box?
The pipe, clamps, and hardware. Everything you need for installation.
How hard is it to install?
It's straightforward if you're comfortable with exhaust work. The factory DPF is heavy and awkward, so having a second person or a jack helps. Expect to spend a few hours on it. The TruckTok pipe fit perfectly on my truck—no modification needed, no fighting to get things aligned.
Will it affect my transmission?
Not directly, but the increased power can affect shift points. A good tuner will adjust transmission parameters to match the new power levels.
Can I add more power later?
Yes. The 4-inch pipe gives you room to grow. If you add bigger injectors or a turbo later, you won't need to upgrade the exhaust again.
Is the fuel mileage gain real?
Yes, but it depends on your driving. The product description mentions going from 13-14 MPG to 18-19 MPG. That's been accurate for my mixed driving. If you have big tires or a heavy foot, your results may vary, but the improvement is real.
The Installation Reality
Installing a DPF delete pipe is a straightforward job if you have basic mechanical skills and the right tools. The factory DPF is heavy, so having a second person or a transmission jack makes removal much safer.
The TruckTok pipe fit perfectly on my truck. No modification needed, no fighting to get things aligned. Everything lined up the first time.
Plan for a few hours in the driveway. Most of that time is spent removing the factory components and getting everything positioned correctly.
The Verdict
The 2013-2018 6.7L Cummins is a fantastic engine, but the factory DPF system holds it back. It adds backpressure, wastes fuel on regens, and comes with an expensive replacement timeline.
The TruckTok 4" DPF Delete Pipe with muffler solves all of that. It lets the engine breathe, lowers EGTs, improves fuel economy by 4-5 MPG, and eliminates a future expense. And with the muffler, you get the performance without the drone.
Paired with a proper tune from a Mini Maxx or similar tuner, this is one of the best upgrades you can make to a 6.7L Cummins. The power gains are real, the fuel savings add up, and the truck just drives better.
If you're on the fence about deleting your 6.7L, this pipe is worth a serious look. It transforms how the truck feels and performs.
If you've deleted the DPF on your 6.7L Cummins, what was your experience? Drop your thoughts below.
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