6.7 Cummins Delete Exhaust: Which System Fits Your Ram

Which System Fits Your Ram's Model Year?

The 5" Exhaust DPF Delete covers the oldest trucks. It fits 2007.5 through 2012 Ram 2500 and 3500 with the 6.7L Cummins, all cab and box lengths, and does not fit Cab & Chassis trucks, 5.9L Cummins, or 2013+ 6.7L. The 4" Full Exhaust System fits 2013 through 2018 pickups. The 5" Full Exhaust System fits the same years. A second 4" Full Exhaust System fits 2019 through 2024 pickups.

Here's the thing — the bracket comes first. Before diameter, before price, before anything else on this page, the bracket decides whether a listing is even in play for your truck. Skip that step and everything after it is guesswork.

Reading your truck's model year before you order

A lot of guys treat "6.7 Cummins" as the whole answer when they go looking for parts. It isn't. Two Rams built a few years apart can wear the same badge and still land on opposite sides of a bracket line, and the bracket is what decides whether a pipe lines up with your hangers or sits in a box on the garage floor.

The early trucks are where it gets interesting. The 2007 Dodge Ram Heavy Duty's new 6.7-liter Cummins turbo-diesel replaced the 5.9-liter engine.^[1] The 6.7-liter Cummins became available in 2007 Dodge Ram 2500 and 3500 models beginning January 2007.^[1]

So if your Ram sits right at the start of the oldest bracket, confirm the engine as well as the year before you spend a dime. Pop the hood, check what's actually sitting there, and write both down. Ten minutes of checking beats owning an exhaust that was never going to fit your truck.

Pickup or Cab & Chassis: the check after the year

The year gets you close. The body finishes the job, and each system draws that line for itself.

The 4" Full Exhaust System fits 2013 through 2018 Ram 2500 and 3500 pickups with the 6.7L Cummins. Does not fit Cab & Chassis, the 5.9L Cummins, or 2019+ trucks.

The 5" Full Exhaust System fits 2013 through 2018 Ram 2500 and 3500 trucks with the 6.7L Cummins. Does not fit Cab & Chassis without modification.

A second 4" Full Exhaust System fits 2019 through 2024 Ram 2500 and 3500 trucks with the 6.7L Cummins. It fits all cab and box lengths, including HD models, but does not fit Cab & Chassis trucks or 2018-and-earlier 6.7L Cummins engines.

Why does the body matter so much? Ram's lineup includes the heavy-duty 2500/3500 as well as 3500/4500/5500 Chassis Cab trucks.^[2] So Ram offers a 3500 both as a heavy-duty pickup and as a Chassis Cab truck.^[2]

Owners of the oldest trucks have one more to rule out. A commercial-use 6.7-liter Cummins turbo-diesel was introduced in early 2006 with the all-new Dodge Ram Chassis Cab.^[1] If that's what's parked in your garage, it's a Cab & Chassis, and you already know how that line reads.

The one bracket with two diameters on this page

Of the four systems covered here, the 2013–2018 bracket is where both diameters sit side by side. That's where you get to make a call on this page, and the buying section further down works through it.

Everyone else can read their row and move on. Here's the whole lineup in one place:

What Is the Factory System Actually Doing?

Diesel combustion expands high-temperature, high-pressure gas that moves the pistons.^[5] A common-rail fuel system stores diesel at high pressure and supplies each injector independently.^[4] A variable geometry turbocharger varies its exhaust passage area to boost pressure and airflow.^[3] Within the 6.7-liter Dodge Ram Heavy Duty exhaust system, a self-cleaning Diesel Particulate Filter (DPF) reduces particulate matter.^[1]

Let's break it down piece by piece, because a DPF delete exhaust means something specific once you know what's actually sitting back there. Fuel, boost and exhaust are three different jobs. Only the last one is what this page is about.

How a diesel engine makes its power

In a diesel engine, combustion expands high-temperature, high-pressure gas to move the pistons, converting chemical energy into mechanical energy.^[5] That's the engine underneath everything else. It's worth understanding even though nothing on this page touches it.

Think of the engine as the lungs and the exhaust as the windpipe. Everything on this page lives in the windpipe.

What a variable geometry turbocharger does

A variable geometry turbocharger varies the exhaust passage area ahead of the turbine wheel to boost pressure and airflow as the engine needs it.^[3] That's the whole trick, and it's a clever one. Boost is the turbo's job, full stop.

What the factory DPF does

In the 6.7-liter Dodge Ram Heavy Duty exhaust system, particulate matter is reduced by a self-cleaning Diesel Particulate Filter (DPF).^[1] Self-cleaning is the phrase to remember. Here's the part people skip: the filter coming out is half the job, and the tune is the other half, which the install section covers bracket by bracket.

Which pieces each system replaces, and where each one starts

Running a truck from the oldest bracket? This exhaust runs downpipe-back, replacing the DPF and CAT with a straight, free-flowing 5" pipe.

Got a truck in the middle bracket? Read these two back to back. This 4" aluminized steel exhaust runs downpipe-back, replacing the OEM DPF and CAT sections with a straight, free-flowing pipe. This 5" pipe runs straight from the turbocharger outlet, replacing the factory DPF, CAT, and every restrictive mid-pipe section.

On a truck in the newest bracket, the story is a familiar one. This is a downpipe-back system in high-quality aluminized steel that replaces the factory DPF and CAT with a straight, free-flowing pipe.

Know which pipe you're getting before you commit, so the parts on your bench match the job you came to do. Starting point and material are the two details worth circling.

How Much Does a 6.7 Cummins Delete System Cost?

The 5" Exhaust DPF Delete for 2007.5–2012 trucks is priced at $849.00–$1,029.00. On 2013–2018 trucks, the 4" Full Exhaust System runs $699.00–$775.00. The 5" Full Exhaust System for the same years is priced at $799.00–$869.00. For 2019–2024, the 4" Full Exhaust System is priced at $699.00–$824.00.

Each of those ranges belongs to one listing and one bracket. Don't borrow a number from the row next door.

Where each price sits across the three brackets

Your bracket picks the row, and the row carries its own range. That's the whole method. Where your truck has one system on this page, the number is simply the number; where it has two, read the buying section below before you settle on one.

The expensive mistake here isn't the price range. It's ordering by badge instead of by bracket and body, then finding out on the garage floor that the pipe was never going to hang right.

Budget for the tune as its own line item, too. The tune is a separate purchase, so write both numbers down — the pipe and the tune — before you call. That way the total is a decision you made, not a surprise you absorbed at the end.

Shipping and checkout options, listing by listing

Shipping reads a little differently from listing to listing, so take yours from your own row.

#### 5-inch, 2007.5–2012

It runs OEM-style hangers and clamps, bolts on across all cab and box lengths, and ships free. A muffler option is available at checkout if you want to take the edge off the sound. Sound is personal, and that call is yours.

#### 4-inch, 2013–2018

Free shipping; standard delivery 8–10 business days. Plan around that window before the next event weekend.

#### 5-inch, 2013–2018

Free shipping; standard delivery 8–10 business days, express 5–8. Faster is there if the calendar is tight.

#### 4-inch, 2019–2024

Free shipping is included, with standard delivery in 8-10 business days and express available at 5-8. Same idea: count back from the day you want it on the truck.

Which One Should You Buy — 4-Inch or 5-Inch?

For a 2013–2018 Ram 2500 or 3500 with the 6.7L Cummins, the 4" Full Exhaust System is the pick if you want a downpipe-back exhaust in aluminized steel. For a 2013–2018 Ram 2500 or 3500 with the 6.7L Cummins, the 5" Full Exhaust System is the pick if you want a full turbo-back pipe in T-409 stainless steel.

Which camp is your build in? Answer that honestly and the rest of this section is easy.

Picture how the truck spends its weekends. If it lives on the dyno and in the pits, the heat-cycle line below carries real weight. If it's a trail rig, weigh bolt-in simplicity just as heavily.

When the model year makes the choice for you

For a 2019–2024 Ram 2500 or 3500 with the 6.7L Cummins, the 4" Full Exhaust System is our pick from this page. No coin toss needed.

Own one of the oldest trucks? The fitment section up top already did the work for you.

What the 5-inch changes on a 2013-2018 truck

Here's where the bigger pipe earns a hard look. T-409 stainless stands up to real heat cycles, and OEM-style hangers and clamps bolt to factory mount locations — no welding. Heat cycles are exactly what a dyno day and a pull weekend are made of.

Our pick for a 2013–2018 competition build is the 5" Full Exhaust System. One thing to plan for first. Trucks with airbag suspension will need a routing adjustment. That's not a reason to walk away from it, just one more line item to sort while the truck is still on the ground instead of up in the air.

What the 4-inch covers on a 2013-2018 truck

We get it — not every build needs the biggest pipe on the page. It's built from high-quality aluminized steel with OEM-style hangers and clamps, so it bolts to factory locations across all cab and box lengths — no cutting, no welding.

There's no prize for over-buying. Match the pipe to the work the truck actually does, and let this bracket's choice be an easy one instead of an intimidating one.

Why Do Owners Delete a 6.7 Cummins in the First Place?

A 4" delete exhaust removes the restriction entirely. On a 2019 through 2024 Ram 2500 or 3500 with the 6.7L Cummins, that's the 4" Full Exhaust System. Cummins engines have been an option in Ram pickups since 1989.^[7] Nearly 70% of all Ram 2500 and 3500 Heavy Duty pickup owners choose the Cummins Turbo Diesel.^[6]

That's a lot of trucks, and a lot of owners asking the same question. Buckle up — here's what comes off, and why it matters to your truck.

What each listing says it removes

Read them back to back and a pattern jumps out. The 5" DPF Delete Exhaust for 2007.5–2012 Ram 6.7 Cummins removes the Diesel Particulate Filter and catalytic converter from your Ram 2500 or 3500, ending forced regen cycles, cutting backpressure, and letting your Cummins breathe through a 5" T-409 stainless steel pipe built for trucks that work.

Here's the pair from the middle bracket. The 4" Full Exhaust System for 2013–2018 Ram 6.7L Cummins removes the Diesel Particulate Filter (DPF) and Catalytic Converter (CAT) from your 2500 or 3500 — ending regen cycles, cutting backpressure […]. The 5" Full Exhaust System for 2013–2018 Ram 6.7L Cummins is a full turbo-back pipe in T-409 stainless steel that removes the Diesel Particulate Filter (DPF) and Catalytic Converter (CAT) from your 2500 or 3500 — ending the regen cycles, backpressure, and EGT spikes that choke these engines under load.

The newest bracket closes it out. The 4" Full Exhaust DPF Delete for the 2019-2024 Ram 6.7 Cummins removes the Diesel Particulate Filter (DPF) and catalytic converter (CAT) from your Ram 2500 or 3500, ending forced regen cycles, cutting backpressure, and letting your Cummins work the way it was built.

Why the 2007.5-2012 listing singles out the DPF

The oldest trucks get the bluntest line. The first-generation 6.7 Cummins is a workhorse, but the DPF system was still new and failure-prone on these years. Regen cycles waste fuel and stress the engine, and a failed DPF gets expensive.

That's the felt side of it, and it belongs to those early years. A newer truck's case rests on its own listing, not on this one.

The Cummins-Ram partnership by the numbers

In 2019, Cummins celebrated a 30-year partnership with Ram that started with the Cummins 5.9L Turbo Diesel in model year 1989.^[8] That's a long run for any partnership under the hood of a pickup. It's the backdrop for every system on this page.

What Should You Know Before You Install It?

A compatible delete tune belongs on the list before the 5" Exhaust DPF Delete goes on. A 2013 through 2018 truck taking the 4" Full Exhaust System gets the same prep. So does one taking the 5" Full Exhaust System. On a 2019 through 2024 truck, the 4" Full Exhaust System follows the same order.

We get it — you want the truck up on stands and the old pipe off. Ten minutes on the floor beats an hour on your back, so start with the box and the tune.

Here's the order we'd work in. Confirm the year and the body, line up the tune, open the box and lay everything out, then put the truck on stands. Jack stands, a good light and a buddy to steady the pipe make it a smoother afternoon.

Before installing on a 2007.5-2012 truck

Open the box before you open the toolbox. You get the T-409 stainless exhaust, the hangers and clamps, and a step-by-step guide. You'll need a compatible delete tune to prevent DPF codes.

Lay every piece out before a single bolt comes off. Exhaust is final sale; damaged or wrong orders are replaced.

Before installing on a 2013-2018 truck

Two systems fit these years, so check the box against your own listing.

#### 4-inch, 2013–2018

Start with the box. You get the full exhaust, the hangers and clamps, and a step-by-step installation guide. You'll also want a compatible delete tune to keep DPF codes away; call us at (888) 830-2588 and we'll match the right one for your year. Exhaust systems are final sale, but damaged or wrong items get replaced free.

#### 5-inch, 2013–2018

Same drill, bigger pipe. You get the turbo-back pipe, hangers and clamps, all install hardware, and a step-by-step guide. You'll need a compatible delete tune so the ECM stops looking for the DPF. Exhaust systems are final sale, but a faulty or wrong pipe gets replaced.

Before installing on a 2019-2024 truck

Here's the box for the newest bracket, piece by piece. In the box you get the 4" aluminized steel full exhaust, the OEM-style hangers and clamps, and a step-by-step installation guide. OEM-style hangers and clamps lock it in the same way the factory exhaust did, so the fit is clean and rattle-free with no welding.

Then the tune. You'll need a compatible delete tune to keep DPF-related check engine codes from setting, so call (888) 830-2588 and we'll pair the right tuner to your 2019-2024 Ram.

Exhaust systems are a final sale, but if your system arrives damaged or we ship the wrong product, we'll send a replacement at no cost. Tech support is included and tickets are answered within one business day. The good news? That covers the questions that come up once the old pipe is already on the floor.

Check the year and the body before you order, not after. Get those two right, line up the tune, and the rest is bolting the right part to the right truck.