DEF Delete Kit

Why Does Your Diesel Need a DEF Delete Kit?

The DEF, DPF, and EGR aftertreatment stack was engineered to scrub NOx, but every one of those components is a wear item that drags on power and fuel economy the moment it starts to fail.

DPF Soot and Ash Restriction

As soot and ash pack the DPF substrate, exhaust backpressure climbs and the engine burns more fuel just to push gases through a clogged filter.
Forced regenerations dump raw fuel into the cycle to burn off that soot, diluting engine oil and spiking exhaust gas temperatures under load.

DEF Hardware Thermal Fatigue

The DEF doser injector, pump, and heated feed lines sit directly in the hot exhaust stream, and they crystallize, corrode, or short out over time.
When DEF freezes, crystallizes, or the heater circuit fails, the whole dosing system goes down and the truck derates within a few hundred miles.

Sensor and Valve Failures That Force Derate

NOx sensors, EGR position sensors, and EGR cooler valves fail from heat and carbon, and the ECM responds by choking power into limp mode.
Most of these failures are intermittent, so the truck runs fine one day and throws a derate code the next, with no reliable pattern for the shop to chase.

What Can a DEF Delete Kit Solve?

A complete delete kit removes the failure-prone aftertreatment hardware from the loop and lets the ECM run a clean, unrestricted tune.

Free-Flowing Stainless Delete Pipes

Mandrel-bent T304 stainless delete pipes and race tubes replace the restrictive DPF substrate, dropping exhaust backpressure so the turbo spools faster and EGTs fall under heavy towing.

Billet Block-Off Plates for the EGR and DEF Feed

Solid CNC-machined 6061-T6 aluminum block-off plates cap the EGR cooler feed and the DEF dosing ports, sealed with high-temperature graphite gaskets that hold pressure across thousands of heat cycles.

CAN Bus Plugs to Clear the ECM

On the 2020-2022 L5P Duramax, plug-and-play CAN bus modules close the NOx and DEF circuits at the ECM with OEM-grade connectors, so the truck runs clean without false sensor codes or wiring modifications.

Tuning That Ties It Together

The all-in-one kits bundle the delete hardware with a matched DPF tuner that rewrites the calibration to run without the DPF, DEF, and EGR systems, unlocking the horsepower, torque, and fuel economy the engine was built to make.

Shop DEF Delete Kit by Engine & Fitment Guide

• DPF/DEF/EGR/CCV All-in-One Delete Kit - Fits 6.7L Powerstroke in Ford F250, F350, F450, and F550 (2011-2014 and 2017-2019). T304 stainless delete pipes, billet EGR block-off, and a matched tuner delete the full aftertreatment stack in one kit.
• DPF/DEF/EGR/CCV All-in-One Delete Kit (2015-2016 variant) - Fits 6.7L Powerstroke in Ford F250 and F350 (2015-2016). A mid-cycle emissions revision requires the dedicated 2015-2016 fitment, so verify your build date before ordering.
• 5" DPF/DEF/EGR/CCV Delete & Tuner Kit - Fits 6.7L Powerstroke in Ford F250 and F350 (2011-2019). Full 5-inch turbo-back delete pipe with an integrated DPF tuner for maximum flow and aggressive sound.
• DPF/DEF/EGR/CCV All-in-One Delete Kit - Fits 6.4L Powerstroke in Ford F250, F350, F450, and F550 (2008-2010). Replaces the failure-prone DPF and EGR cooler with a stainless delete pipe and MiniMaxx-compatible tuning.
• 4" DPF/EGR/DEF Delete Kit w/ Muffler - Fits 6.7L Cummins in Dodge Ram 2500 and 3500 (2010-2014). 4-inch delete pipe with muffler, EGR cooler block-off, and matched delete tuning.
• L5P CAN Bus NOx/DEF Module Plugs - Fits 6.6L Duramax L5P in Chevy/GMC Silverado/Sierra 2500HD and 3500HD (2020-2022). Plug-and-play CAN bus modules close the NOx and DEF circuits at the ECM with no wiring cuts.

Why Choose EGR Performance?

The industry standard for high-performance diesel reliability.

Premium Quality & Rigorous Testing

Our EGR, DPF, and CCV delete kits are engineered from premium-grade materials and subjected to brutal quality control and field testing. Unlike generic alternatives, our products are built to withstand extreme heat and pressure, delivering unmatched durability and long-term stability when your rig needs it most.

20 Years of Proven Diesel Expertise

We aren't just selling parts. We live in this industry. With two decades of hands-on experience providing specialized modification solutions for heavy-duty truck owners, our upgrades have been extensively proven across every driving environment, from daily towing to high-performance tracks.

Industry-Leading Standards

We work hand-in-hand with top-tier industry partners and reputable organizations. Every product we design, test, and ship meets or exceeds strict industry standards, ensuring your Powerstroke, Cummins, or Duramax gets the exact precision it deserves.

Real Results, Proven Track Record

Thousands of diesel owners trust us to unlock their engine's true potential. Our massive library of positive customer feedback and successful build case studies proves one thing: our kits deliver real horsepower, lower EGTs, and flawless reliability in the real world.

What does a DEF delete kit do?

A DEF delete kit removes the diesel exhaust fluid dosing system, and usually the DPF and EGR hardware, from the exhaust and aftertreatment loop so the engine runs without them.
It includes delete pipes or race tubes, block-off plates, and the electronic modules or tuner calibration needed to stop the ECM from flagging those systems as missing.
The result is unrestricted exhaust flow, fewer forced regenerations, and a cleaner-running tune for competition and off-road builds.

How much horsepower does a DEF delete add?

Most trucks pick up a noticeable bump in throttle response just from removing the exhaust restriction, and with matched tuning the gains get much larger.
Owners commonly report 20 to 80 additional horsepower, with some well-tuned 6.7 Cummins and Powerstroke builds climbing past that.
The exact number depends on the tune, turbo health, and fuel system, so we always pair the delete with a compatible tuner for real horsepower, not just a louder exhaust.

Will a DEF delete improve my fuel economy?

Removing the DPF and DEF hardware cuts exhaust backpressure and stops the fuel-hungry regeneration cycles, which is where most of the economy gain comes from.
Drivers typically see a 1 to 4 MPG improvement depending on how the truck is tuned and how heavily it is loaded.
You also spend less on DEF fluid, doser pump repairs, and DPF cleanings over the life of the truck.

Do I need a tuner to run a DEF delete kit?

Yes, a compatible tuner or calibration is required whenever you remove the DPF, DEF, or EGR hardware.
The ECM continuously monitors those systems through NOx sensors and differential pressure sensors, and without a delete tune it will trigger check engine codes and force the truck into derate.
Our all-in-one kits bundle the delete hardware with a matched tuner so the calibration and the hardware are set up for each other.

What is included in a DEF delete kit?

A complete kit includes T304 stainless steel delete pipes or race tubes, CNC-machined 6061-T6 billet aluminum block-off plates, high-temperature graphite gaskets, and stainless band clamps.
The 6.7 Powerstroke and 6.7 Cummins all-in-one kits also add EGR cooler block-off and a matched DPF tuner.
For the 2020-2022 L5P Duramax, the CAN bus plug kit handles the electronic side with plug-and-play NOx and DEF modules at the ECM.

How long does a DEF delete take to install?

A full all-in-one kit on a 6.7 Powerstroke or 6.7 Cummins usually takes a shop six to eight hours, including dropping the exhaust, removing the DPF and EGR hardware, and loading the delete tune.
The L5P CAN bus plug kit is far faster, often under an hour, since it plugs into existing connectors with no cutting or welding.
We recommend following a build video end to end before you start, and keeping it up through the install.

Will a DEF delete fit my 6.7 Powerstroke, Cummins, or L5P Duramax?

This collection carries kits for the 6.7L Powerstroke from 2011 to 2019, the 6.4L Powerstroke from 2008 to 2010, the 6.7L Cummins from 2010 to 2014, and the 6.6L L5P Duramax from 2020 to 2022.
The 6.7 Powerstroke splits at the 2015-2016 model years because of a mid-cycle emissions change, so confirm your exact build date before ordering.
If you are unsure which generation you have, message our 24/7 live support with your VIN and we will match the correct kit.

Will deleting DEF void my factory warranty?

Removing federally mandated emissions equipment can give the dealer grounds to refuse coverage on affected powertrain and aftertreatment components, so assume the factory warranty on those systems is gone after a delete.
This is exactly why deletes are built for competition and closed-course off-road trucks rather than street-driven daily drivers.
Many owners accept that trade for the reliability gains on a dedicated work or tow rig.

Are DEF delete kits legal, and what is your shipping and return policy?

DEF, DPF, and EGR delete kits are sold for competition and closed-course off-road use only, and removing emissions controls violates federal EPA rules for on-road vehicles, so they are not street legal and may fail local inspections.
Because fitment is critical, double-check your engine code and year range before ordering, then take advantage of our fast free shipping, our 1-year warranty against manufacturing defects, and our 45-day return policy if the part does not match your build.
Our 24/7 live support team can confirm the exact kit for your truck before you place the order.

Can I run my diesel without DEF after installing the kit?

Once the DEF system is deleted and the ECM is tuned for it, the truck no longer draws or injects diesel exhaust fluid, so you stop filling the DEF tank and stop buying fluid.
The doser, pump, and tank stay in place but are taken out of the active loop, and the delete tune clears the low-DEF and NOx faults that would otherwise derate the engine.
You still need to stay on top of oil and fuel filter service, since a deleted tune makes engine maintenance even more important.