6.7 Cummins DPF and EGR Delete Kit: Complete Buyer's Guide (2007.5–2024)

Here's the deal — the 6.7L Cummins is an outstanding engine that gets strangled by its own emissions architecture. From the factory, three overlapping systems work together to reduce tailpipe output: the EGR (Exhaust Gas Recirculation) system, the DPF (Diesel Particulate Filter), and — on 2013+ trucks — the DEF/SCR (Diesel Exhaust Fluid / Selective Catalytic Reduction) system.

Each system adds complexity, heat, and restriction. The EGR routes hot exhaust back into the intake to reduce NOx emissions, which progressively coats the intake manifold with soot. The DPF traps particulate matter and must periodically self-clean via forced regen cycles, which burn extra fuel and stress the engine. The SCR system injects DEF fluid into the exhaust stream to chemically reduce NOx output downstream.

A full delete kit addresses all three. According to The Diesel Dudes ^[111], a properly configured kit for a 2013–2018 6.7 Cummins starts at $1,832 and covers the complete system. The three core components in every kit are:

• Delete tuner — rewrites ECM calibration to ignore missing emissions hardware and add power levels
• DPF/SCR delete pipe — replaces the factory DPF and SCR canister with a straight-through exhaust section
• EGR delete hardware — block-off plates, coolant reroute components, gaskets, and hardware to seal off the EGR valve and cooler

Without all three working together, you get check engine lights, limp mode, and drivability issues. The tuner is the brain — bolting delete pipes without a supporting tune is a guaranteed way to strand your truck. Each component must be matched to your specific model year, as the emissions hardware layout changes significantly across the 2007.5–2024 production run.

Disclosure: The Diesel Dudes sells some of the products mentioned in this article. Our recommendations are based on hands-on testing and customer feedback.

Let's be straight about this — there is no gray area under U.S. federal law. The EPA's tampering prohibition under 42 U.S.C. § 7522(a)(3) makes it illegal for any person to remove or render inoperative any emission control device installed on a motor vehicle. That covers DPF, EGR, SCR/DEF systems, associated sensors, and the catalysts — all of it.

The statute also prohibits manufacturing, selling, or installing any part that bypasses, defeats, or renders inoperative an emissions control device. This applies to both the shop performing the work and, in some cases, the vehicle owner. The EPA has pursued civil penalties against both kit manufacturers and dealers under these provisions, with fines reaching into the millions for commercial operations.

According to the EPA's Clean Air Act enforcement framework [under 42 U.S.C. § 7524], penalties for individuals tampering with emissions equipment can reach $5,000 per violation. For commercial entities selling defeat devices, penalties can be substantially higher.

A few critical points to understand:

• State inspection laws don't override federal law. Even if your state doesn't test diesels or has no visual inspection, the federal prohibition still applies on public roads.
• Shops face significant liability. Most reputable diesel shops will not perform deletes on road-registered vehicles — they risk their EPA certifications, shop licenses, and face personal liability under federal statutes.
• OEM warranty is void. Stellantis/Ram's factory warranty explicitly excludes coverage for any powertrain or emissions component altered or removed from stock configuration. Dealers can detect prior tuning through ECM history even after a reflash to stock.

The bottom line: Every delete kit sold by The Diesel Dudes is explicitly for off-road and competition use only. If your truck is registered and driven on public roads, do not install a delete kit. Understand your local and state laws before proceeding with any emissions modification.

This is the single biggest mistake buyers make — grabbing a generic kit without confirming it's spec'd for their exact year. Here's a generation-by-generation breakdown of what changes and why it matters.

The biggest curveball is the 2022–2024 generation. Starting in 2019, Stellantis began hardening ECM/TCM encryption. By 2022, the encryption is robust enough that flashing delete calibrations directly onto the stock ECM is not a reliable option. The full delete solution for 2022–2024 trucks ^[113] starts at $6,734 and requires installing an unlocked ECM that can accept the delete tuning — a significant but necessary step for trucks in this range.

For 2007.5–2021 trucks, tuning is handled entirely through the OBD-II port with no ECM swap required. The The Diesel Dudes EFI Live Autocal V3 tuner ^[54] handles 2007–2021 6.7 Cummins trucks, while the EZ Lynk Auto Agent 3 ^[70] supports 2007.5–2021 with lifetime tune support included.

Also confirm whether your truck is a standard pickup or a Cab & Chassis configuration — some EGR kits and exhaust systems are designed specifically for one or the other. The Cab & Chassis Ram Cummins Full Delete Bundle ^[35] addresses this fitment difference directly.

What's Included in the Ram Cummins 6.7 Full Delete Bundle

• Delete Tuner — the brain of the kit; loads delete calibration via OBD-II port (or works with unlocked ECM on 2022–2024); provides multiple power levels (tow, street, performance) and real-time monitoring for EGT, boost PSI, rail pressure, and transmission temp
• DPF & CAT Delete Pipe — bolt-in replacement for the factory DPF/CAT assembly; available in 4" or 5" diameter; constructed from T409 stainless steel for corrosion resistance; retains necessary sensor provisions as required by the tune
• EGR Valve & Cooler Delete Kit — vehicle-specific CNC-cut block-off plates, coolant reroute hardware, quality gaskets, and all necessary fasteners to fully seal and bypass the EGR system
• SCR/DEF Delete Components (2013+ trucks) — deletes the DEF injector, NOx catalyst section, and associated sensors via the replacement exhaust and ECM calibration

The The Diesel Dudes 2013–2018 Ram Cummins 6.7 Full Delete Bundle ^[111] consolidates all of these components into a single, matched package starting at $1,832. The 2019–2021 bundle ^[112] starts at $2,394 and includes updated hardware for the fifth-gen platform.

Here's the thing — the tuner is what separates a clean delete from a disaster. Simply bolting on a DPF delete pipe without a supporting tune leaves the ECM in a fault state. You get a wall of check engine lights, potential limp mode, and the EGR valve still trying to operate. The tune recalibrates fueling tables, disables all DPF/DEF/EGR monitoring logic, and optimizes boost pressure and injection timing for the new unrestricted exhaust flow.

The EFI Live Autocal V3 ^[54] is a proven OBD-II tuner for 2007–2021 6.7 Cummins trucks with multiple shift-on-the-fly power levels. The EZ Lynk Auto Agent 3 ^[70] adds wireless connectivity and real-time cloud tune support, making it a strong choice for owners who want over-the-air calibration updates. The RaceMe Ultra ^[107] is another popular option on the 6.7 Cummins platform, offering an integrated gauge display alongside the delete tuning.

Popular add-ons that complete the build include the Throttle Valve Delete ^[121] — the 6.7 Cummins uses a throttle valve in the intake that works in conjunction with the EGR system and should be removed when deleting — and the CCV Delete Kit ^[36] to eliminate crankcase oil misting into the intake post-EGR delete.

Let's break it down by system so you understand exactly where the gains come from.

DPF removal: The factory DPF creates significant exhaust backpressure. On a 6.7 Cummins working hard under a tow load, that backpressure forces the turbo to work against increased exhaust restriction — reducing boost efficiency and raising exhaust gas temperatures (EGT). Removing the DPF and replacing it with a free-flowing 4" or 5" delete pipe drops exhaust backpressure dramatically, allowing the variable geometry turbocharger to spool more efficiently and deliver higher boost PSI with less heat penalty.

EGR removal: The EGR system dilutes intake charge air with hot, soot-laden exhaust gas. This reduces combustion temperature (the NOx-reducing intent) but also reduces combustion efficiency and introduces carbon particulate directly into the intake manifold and charge air cooler. Over time, EGR-related carbon buildup restricts airflow and forces the ECM to compensate with richer fueling. Deleting the EGR eliminates that soot stream, restoring full intake flow and cleaner combustion.

ECM tune: This is where the bulk of measurable HP gains come from. According to The Diesel Dudes ^[111], delete tunes for the 6.7 Cummins typically offer power levels in the +25 to +180 HP range depending on tune aggressiveness and truck year. Tow tunes on the conservative end add 25–50 HP while staying thermally safe for heavy trailer work. Performance and competition tunes push higher, with the gains most pronounced in the mid-range RPM band where DPF and EGR restrictions were creating the most resistance.

EGT management is worth monitoring carefully. With EGR gone, combustion runs hotter at the cylinder level — which is part of the efficiency gain — but it means EGTs require attention under sustained heavy load. The RaceMe Ultra ^[107] and EZ Lynk Auto Agent 3 ^[70] both provide built-in EGT monitoring. For dedicated towing applications, pairing with the EZ Lynk EGT Sensor Kit ^[68] gives you a dedicated pyrometer channel for real-time monitoring.

MPG improvements are commonly reported by owners who delete DPF/EGR systems for off-road use, primarily because regen cycles stop burning extra fuel and overall engine efficiency improves. Real-world results vary based on tune level selected, load, tire size, and driving style.

The reliability case for deleting a 6.7 Cummins (for off-road use) is well-documented across the ownership community. Here are the specific failure modes that drive owners to delete kits.

EGR cooler failure: The EGR cooler on the 6.7 Cummins routes engine coolant through a heat exchanger to cool the recirculated exhaust before it enters the intake. Over time, the internal passages of the cooler develop cracks from thermal cycling, allowing coolant to mix with exhaust and enter the intake manifold. Left unaddressed, this leads to coolant loss, white smoke, and potential hydrolock. EGR cooler replacement at a dealer runs $800–$1,500 in parts and labor. The EGR Delete for 2010–2024 trucks ^[60] eliminates this failure point entirely by removing the cooler and blocking off the coolant passages.

DPF plugging and regen failures: Trucks used for short trips, low-load urban driving, or heavy towing at low RPM often struggle to complete active regen cycles. When regen cannot complete, soot accumulates in the DPF until the filter reaches a critical restriction level, triggering a derate condition that limits the truck to reduced power. A full DPF replacement costs $2,000–$4,000 depending on the year. The 5" Full Exhaust System for 2013–2018 ^[29] replaces that entire assembly with a straight-through stainless pipe.

DEF system faults: On 2013+ trucks, the SCR system adds a DEF pump, DEF injector, NOx sensors upstream and downstream of the SCR catalyst, and a DEF quality sensor in the tank. Each component is a potential failure point. NOx sensor failures alone run $200–$600 per sensor, and the DEF injector is a known wear item. The complete SCR delete via the full bundle eliminates all of these components from the equation.

Based on The Diesel Dudes' customer support history, the most consistent feedback from owners who have completed full deletes on their off-road competition and farm trucks is the elimination of unplanned downtime from emissions-related faults. A truck that isn't stuck in limp mode or waiting on a DPF regen is a truck that works.

Follow this checklist before placing an order to make sure you get the right hardware the first time.

1. Confirm your exact model year and build. The 6.7 Cummins emissions system changed significantly between 2007.5–2012 (DPF + EGR only), 2013–2018 (added SCR/DEF), and 2019–2024 (hardened ECM encryption on 2022+). Using a 2013–2018 EGR delete kit on a 2010 truck is a fitment mismatch.
2. Pickup vs. Cab & Chassis. Cab & Chassis trucks use a different exhaust routing than standard pickup configurations. The dedicated Cab & Chassis Ram Cummins Full Delete Bundle ^[35] is engineered for this platform. Don't assume a standard pickup kit will bolt in.
3. Choose your tuner. Three main options for 6.7 Cummins: EFI Live Autocal V3 ^[54] (2007–2021, multiple shift-on-the-fly power levels), EZ Lynk Auto Agent 3 ^[70] (2007.5–2021, wireless connectivity, lifetime tune support), and RaceMe Ultra ^[107] (integrated display, broad 6.7 Cummins fitment). For 2022–2024, the 2022–2024 Cummins Delete Tuning Kit ^[12] handles the required ECM solution.
4. Select exhaust diameter. 4" systems flow well and are a direct replacement for factory pipe diameter. 5" systems provide maximum flow for performance builds and high-power tune levels. Both are available in T409 stainless construction.
5. Decide on scope. EGR-only deletes address intake soot issues but leave DPF/DEF problems in place. DPF-only deletes remove exhaust restriction but EGR still fouls the intake. Full DPF + EGR + DEF delete bundles are the cleanest, most reliable solution for off-road use — one matched system, one tune, one install.
6. Add complementary components. The Throttle Valve Delete ^[121] should accompany any EGR delete on 2007.5–2024 6.7 Cummins. The CCV Delete Kit ^[36] prevents crankcase vapor from coating intake tract post-EGR delete.

The Diesel Dudes carries full delete bundles for every 6.7 Cummins generation at thedieseldudes.com/collections/dodge ^[128]. If you're unsure which kit fits your specific truck, call (888) 830-2588 — our technical team will confirm fitment before you order.

You don't need a step-by-step torque spec guide here — but understanding the sequence and what's involved helps you decide DIY vs. shop install and set realistic time expectations.

Install sequence (critical): Always flash the delete tune onto the ECM before touching any hard parts. The ECM needs to be calibrated for the new hardware configuration before the truck runs without emissions components. For 2022–2024 trucks, the ECM swap happens first. For 2007.5–2021, plug the tuner into the OBD-II port with a battery charger connected to maintain voltage during the flash — a low-voltage flash mid-process can corrupt the ECM file.

DPF delete pipe swap (1–2 hours): With the truck on a lift, disconnect the EGT sensors, differential pressure sensor tubing, and oxygen sensors from the DPF assembly. Unbolt from the turbo outlet and the rear section. Drop the factory DPF/SCR assembly and slide the delete pipe in. On 2013+ trucks, the SCR canister section also gets removed at this step. Sensor bungs get capped or plugged per the kit instructions.

EGR delete (2–4 hours): Disconnect both batteries before starting. Remove the intake components necessary to access the EGR valve and cooler — this varies by year but typically involves the air intake assembly and some coolant lines. Remove the EGR valve, EGR cooler, and crossover pipe. Install the block-off plates with fresh gaskets and route the coolant reroute hardware included in the EGR delete kit ^[60]. Bleed the cooling system after reassembly to prevent air pockets.

Home installs on a jackstand setup realistically take 6–8 hours for a first-timer. A shop with a lift and experience on the platform can complete the full delete in 4–5 hours. The EFI Live Autocal V3 ^[54] and EZ Lynk Auto Agent 3 ^[70] both include detailed instructions and The Diesel Dudes provides video walkthrough support for customers.

Post-install: verify zero coolant leaks, confirm no active DTCs after a restart, and monitor EGT and boost on the first off-road drive. The Shibby Engineering Tuner Harness Plug Kit ^[122] is a clean way to manage the sensor harness connections on the Cummins platform during install.