1. Overview — What Is a Ram 6.7 Cummins Delete Kit?
This guide explains what a Ram 6.7 Cummins delete kit is, how the 6.7's EGR, DPF, and DEF network are laid out, the 2026 legal picture, why owners turn to delete kits, what a complete delete kit includes, the installation guide for each component, and the tradeoffs for delete kit. Whether you search for a 2020 ram 3500 delete kit, a 2015 ram 2500 full delete kit, a delete kit for 2015 6.7 cummins, or a delete kit for 2021 ram 2500, the goal is the same: remove a failure-prone stack and keep the truck reliable.
A Ram 6.7 Cummins delete kit replaces the factory EGR cooler and valve, DPF, SCR/DEF system with straight-through pipes and block-off plates, then reprograms the ECM with a tuner so the engine no longer runs regen or expects DEF injection. It is sold as an all-in-one package to save your time gathering all delete parts and farewell to limp mode.
2. 6.7 Cummins Emission System Architecture: What You're Working With
The 6.7L Cummins (2013-2021) uses three stacked aftertreatment components plus a closed crankcase ventilation (CCV) system. Exhaust leaves the turbo, first hits the diesel oxidation catalyst (DOC), then the diesel particulate filter (DPF), then the SCR catalyst with DEF injected into a mixing tube just upstream. A separate exhaust gas recirculation (EGR) loop routes a metered portion of exhaust back into the intake through a liquid-cooled EGR cooler and an electronically controlled EGR valve.
The EGR path is what causes most owner pain. Hot exhaust gas passes through the cooler — narrow tubes carrying the exhaust itself, surrounded by engine coolant — before re-entering the intake. Over tens of thousands of short trips, soot and oil mist pack the gas side while thermal cycling fatigues the cooler tubes. The DPF captures soot and burns it off during active regen, but regen only completes at sustained highway temperatures. If you tow, commute, or idle a lot, the DPF never reaches full burn-off temperature and the ECM keeps re-triggering regen. The DEF system relies on a heated tank, heated lines, and an SCR catalyst — when any of those fails, the ECM starts a countdown to limp mode.
The failure modes are interconnected: a leaking EGR cooler dumps coolant that the DPF/SCR system then has to process, and a failing DEF heater can mask deeper exhaust issues by dominating the dashboard with countdown warnings. Note that 2019+ Rams switched to a dual (high- and low-pressure) EGR layout with a redesigned cooler and turbo, so the hardware and tune differ from the 2013-2018 setup even though the failure modes carry over.
3. Is a 6.7 Cummins Delete Kit Legal in 2026?
Short answer: No. A delete kit is an emissions-defeat device under the federal Clean Air Act. It is not legal to install on any vehicle operated on public roads in the United States, and the EPA and CARB can pursue civil penalties for tampering.
The legal picture is straightforward: if the truck is registered, insured, or driven on public roads, the factory EGR, DPF, and DEF hardware must remain functional and on the vehicle. Off-road, race, or export-only use is the only legal context in the U.S. Buyers should weigh the risks before installing one.
4. Why Ram Cummins Diesel Owners Consider DPF/DEF/EGR Delete
Three 6.7 Cummins owners, three different failure points, each described in their own words on the Cummins Diesel Forum.
DPF derate on the highway. A 2019 Ram 3500 dually owner described a single trip that stranded him in limp mode: "I just bought this truck drove it about 2000 miles all is well it regenerated once and no problems… next it said it will go in limp mode in 200 miles… Not a few miles further the truck downshifts into 4th and I had to drive at high RPM's the last 120 miles." — cumminsforum.com/threads/2019-cummins-6-7-3500-dually-exhaust-filter-full
EGR cooler leaking coolant with no drips. A 2018 Ram 2500 owner added coolant weekly before a shop confirmed the cooler: "Well, I had to add coolant to my 2018 Ram 2500 6.7L Cummins this past week… they told me the EGR cooler was bad." — cumminsforum.com/threads/egr-cooler-bad
DEF system fault and the 5-mph countdown. A 2017 Ram 2500 owner watched the warning appear with no easy fix: "I got the DEF system failure message that said I was going into the 5MPH Limp Mode in 140+ miles." — cumminsforum.com/threads/fury-road-a-def-system-failure-saga
5. What a Complete Ram 6.7 Cummins Delete Kit Should Include
A complete 2013-2021 Ram 6.7 Cummins delete kit has two halves: hardware and tuning. The hardware replaces every piece of the aftertreatment stack: a 4'' or 5'' stainless steel DPF/DEF delete pipe and an EGR delete kit. The tuning half is a tuner (EFI Live AutoCal V3, Mini Maxx V2, or EZ LYNK) that reprograms the ECM to disable regen, clear DPF and DEF codes, and remove the 5 mph limp mode trigger.
What separates a usable kit from a parts pile is whether the hardware and the tune are matched and pre-validated. For a 2020 ram 3500 delete kit, a 2015 ram 2500 full delete kit, a delete kit for 2015 6.7 cummins, or a delete kit for 2021 ram 2500, the all-in-one package is the route most owners take. The EFI Live kit below covers the full 2013-2021 range, while the Mini Maxx V2 and EZ LYNK kits are built for the 2013-2018 6.7L Cummins — pick the tuner that matches your year and comfort level.
DPF/DEF/EGR Delete 2013-2021 Ram 2500/3500 Cummins 6.7L All-in-One Kit, EFI Live custom tuning
$1,307.00 $1,110.95
- Complete hardware: 4"/5'' DPF delete pipe, EGR block-off plates, and EFI Live AutoCal V3 tuner.
"My DPF was really plugged up with soot and the truck was feeling sluggish, did several DPF cleaning before but I was tired of it. We originally want to just get rid of the stock exhaust but once I spoke to their sales team we decided to go with this kit instead. Truck drives better and I don't need to press down on the peddle as much to get things moving. I'm getting more miles out of my tank now!" — Alex
View & Buy with Code: DPF15 to Get 15% Off
DPF/DEF/EGR Delete 2013-2018 Dodge Ram 2500/3500 6.7L Cummins All-in-One Delete Kit, Mini Maxx V2
$1,310.00 $1,113.50
- Full hardware set including DPF pipe, EGR plates, and Mini Maxx V2 tuner.
"Very satisfied with how it looks. Hopefully it last for many years. Everything came as it should shipping was fairly quick. Instructions would be helpful. Other than that we shall see." — James
View & Buy with Code: DPF15 to Get 15% Off
DPF/DEF/EGR Delete 2013-2018 6.7L Cummins Dodge Ram 2500/3500 All-in-One Kit, EZ LYNK Tune Package
$1,609.99 $1,368.49
- Full hardware set for 2013-2018 6.7L Cummins Ram 2500/3500.
- EZ LYNK allows you to monitor your vehicle and change tunes from your mobile phone.
6. Installation Guide for 2013-2021 6.7 Cummins Delete Kit
We've put together step-by-step walkthroughs for each part:
- How to Install EGR Delete on 2013-2018 Dodge Ram 6.7L Cummins
- How to Install EGR Delete on 2019+ Dodge Ram 6.7L Cummins
- How to Install DPF Delete Pipe on 2013-2018 Dodge Ram 6.7 Cummins
- How to Install DPF Delete Pipe on 2019+ Dodge Ram 6.7 Cummins
- How to install EFI Live AutoCal V3 Delete tuner
- How to install Mini Maxx V2 tuner
- How to install EZ LYNK tuner
Plan a full weekend for the install; confirm the tuner is paired to your exact model year before you start. If anything in the hardware or tune is unclear, reach out to service@dpfexhaust.com before you button it up.
7. Risks, Tradeoffs, and Responsible Use of the 6.7 Cummins Delete Kit
Deleting the emissions system is not free of downside. On the mechanical side, you remove the components most likely to strand the truck — no more DPF regen cycles, no more EGR cooler weeping coolant, no more DEF heater failures — and owners commonly report better throttle response and 1-3 MPG back on the highway. Truck also runs cooler and cleaner on the gas side once the soot path into the intake is gone.
On the other side of the ledger: the modification is federally illegal for any on-road, registered vehicle, and it voids the powertrain warranty. You take on failed inspections, possible fines, and the resale hit of a truck that can't pass emissions. Some states now flag deleted VINs at renewal.
Responsible use means being honest about the context: these kits belong on dedicated off-road, race, farm, or export vehicles. If your goal is simply to stop a failure, weigh a stock-spec repair or an OEM cooler replacement first. For off-road-only builds, a matched all-in-one kit plus the correct tuner is the reliable path, and questions about fitment or tuning should go to service@dpfexhaust.com before you order.
Questions about fitment, tuning, or which kit fits your Ram? Email service@dpfexhaust.com and we'll help you pick the right setup.
We hope this guide helps you get the most out of your 6.7 Cummins.
Have a great day! 🙂
