Cummins B6.7 EGR Delete

Why Does Your Cummins B6.7 Need an EGR Delete?

Soot Buildup Chokes the Intake Manifold

The factory EGR system routes exhaust gas at 1,200 degrees Fahrenheit back into the intake manifold of your Cummins B6.7. That gas carries carbon particulates that coat the intake runners, intake valves, and EGR valve stem in a hard black glaze. Over 50,000 miles the restriction becomes measurable. Boost pressure drops, throttle response goes soft, and the variable-geometry turbocharger works harder to maintain the same manifold pressure. A billet aluminum EGR block-off plate stops that carbon at the source, keeping the intake tract clean and the HPCR injectors fed with dense, oxygen-rich charge air.

Thermal Fatigue Cracks the EGR Cooler

The EGR cooler on the 6.7L Cummins cycles between 200-degree coolant on one side and 1,200-degree exhaust gas on the other, thousands of times per trip. That thermal gradient fatigues the cooler housing until it develops hairline cracks. Coolant seeps into the exhaust stream, evaporates into white smoke, and eventually dumps enough liquid to hydrolock cylinders. Replacing the factory cooler costs thousands in parts and labor, and the new unit carries the same design flaw. Our T304 stainless steel coolant bypass pipe eliminates the cooler entirely, routing coolant straight through a dedicated circuit with precision TIG welds and high-temperature Viton O-rings that hold pressure under sustained heavy towing.

Stuck EGR Valve Triggers Limp Mode

Carbon accumulation on the EGR valve stem causes it to seize open or closed. The ECM detects the position mismatch and throws codes in the P0400 through P0406 range, lighting the check engine lamp and potentially triggering limp mode. A stuck-open EGR valve bleeds boost pressure and pours unburned fuel into the exhaust, spiking exhaust gas temperatures and loading the DPF with excessive particulate. Deleting the EGR valve with our billet block-off plate removes the valve, the sensor, and the failure mode in one clean operation.

What Can a Cummins B6.7 EGR Delete Solve?

Cooler Intake Air for Denser Combustion Charge

Without exhaust gas diluting the intake charge, the B6.7 breathes ambient-temperature air instead of 1,200-degree recirculated exhaust. Scan tool data consistently shows intake air temperature drops of 20 to 40 degrees Fahrenheit under load after a proper delete. Denser air means more oxygen per combustion cycle, cleaner fuel burn, and reduced thermal stress on pistons, rings, and cylinder walls.

Lower EGTs Under Sustained Tow Load

Eliminating the EGR circuit reduces exhaust backpressure and lets the variable-geometry turbocharger spool more efficiently. Owners report exhaust gas temperature drops of 200 to 300 degrees Fahrenheit under heavy tow loads, which protects the turbocharger bearings and exhaust valves from heat damage during long grade pulls.

Cleaner Oil and Extended Service Intervals

No soot recirculation means the intake charge stays clean, combustion stays complete, and blowby gases carry fewer carbon particulates into the crankcase. Engine oil stays visibly cleaner between changes, and many owners extend their oil service intervals from 5,000 to 7,500 miles after a properly tuned delete with full-synthetic oil and premium filters.

Shop Cummins B6.7 EGR Delete by Ram Engine & Fitment Guide

• EGR Delete Kit for 6.7 Cummins (Black, 2013-2019) - Fits 6.7L Cummins B6.7 in Ram 2500/3500 (2013-2019). CNC-machined 6061-T6 billet aluminum block-off plates with black anodized finish, T304 stainless steel coolant bypass pipe, and high-temperature Viton O-rings. Eliminates EGR cooler, throttle valve, and EGR valve in one kit.
• EGR Delete Cooler Throttle Valve Kit (2013-2019) - Fits 6.7L Cummins B6.7 in Ram 2500/3500 (2013-2019). Includes billet aluminum block-off plates, stainless bypass hose, throttle valve delete adapter, and all required gaskets and bolts. Designed for pickup configurations with SCR and DEF systems.
• EGR Cooler Throttle Valve Delete Kit (2010-2014) - Fits 6.7L Cummins ISB/B6.7 in Ram 2500/3500 (2010-2014). Covers the EPA 2010 generation with refined emissions controls. Block-off plates seal intake and exhaust manifold ports; coolant bypass reroutes the circuit away from the removed cooler.
• EGR Delete Cooler Kit (2007.5-2009) - Fits 6.7L Cummins ISB in Ram 2500/3500/4500/5500 (2007.5-2009). Covers the first 6.7L generation with DPF added and EGR enhanced. Billet aluminum plates and stainless bypass hose for the earliest 6.7L emissions configuration.
• EGR Delete Throttle Valve Coolant Bypass (2013-2019) - Fits 6.7L Cummins B6.7 in Ram 2500/3500 (2013-2019). Combo kit with throttle valve delete, coolant bypass pipe, and block-off plates. Precision TIG welds on all stainless steel joints for leak-free operation under thermal cycling.
• EGR Throttle Valve Delete Kit (2007-2017) - Fits 6.7L Cummins ISB/B6.7 in Ram 2500/3500 (2007-2017). Covers the broadest year range from the first ISB 6.7L through the B6.7 naming rebrand. Removes the intake throttle valve assembly that restricts airflow during warmup and regen cycles.
• EGR Delete Kit for Cab & Chassis (2013-2018) - Fits 6.7L Cummins B6.7 in Ram 3500/4500 Cab & Chassis (2013-2018). Specifically engineered for cab-and-chassis configurations where the EGR system layout differs from pickup versions. Dedicated hardware for the chassis cab coolant routing.
• 4" DPF Delete & EGR Delete Combo Kit (2010-2014) - Fits 6.7L Cummins ISB/B6.7 in Ram 2500/3500 (2010-2014). Complete exhaust and intake solution with 4-inch aluminized steel DPF delete pipe, EGR block-off plates, coolant bypass, and throttle valve delete. Maximum airflow for competition and closed-course builds.

Why Choose EGR Performance?

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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.

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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 an EGR delete do on a Cummins B6.7?

An EGR delete on a Cummins B6.7 removes the exhaust gas recirculation system, including the EGR cooler, EGR valve, and throttle valve.
The factory system routes hot, soot-laden exhaust gas back into the intake manifold to reduce NOx emissions, but it coats the intake tract with carbon and fatigues the cooler from thermal cycling.
Installing CNC-machined 6061-T6 billet aluminum block-off plates and a T304 stainless steel coolant bypass pipe eliminates those failure points, giving the engine clean, dense charge air and cooler operating temperatures under load.

What are the symptoms of a failing EGR cooler on a 6.7 Cummins?

The most common signs of a failing EGR cooler on a 6.7 Cummins are unexplained coolant loss with no visible external leak, white steam from the exhaust, and persistent white smoke after the engine warms up.
Engine overheating under tow load and a sweet smell from the exhaust are also indicators of coolant entering the combustion chambers through a cracked cooler.
Pull codes with an OBD-II scanner; codes in the P0400 through P0406 range point to EGR system trouble that warrants immediate attention before the cooler fails completely and hydrolocks the engine.

How much horsepower does an EGR delete add on a Cummins B6.7?

An EGR delete alone on a Cummins B6.7 typically adds 20 to 40 horsepower when paired with a proper off-road tune, with the larger gains coming from cooler, denser intake air and reduced exhaust backpressure.
When combined with a full DPF delete pipe and aggressive competition tuning, gains of 100 to 150 horsepower are common, and highly modified builds with supporting fuel system upgrades can exceed 250 horsepower over stock.
The exact numbers depend on tune quality, hardware condition, and whether you are running a pickup or cab-and-chassis configuration.

Will an EGR delete improve fuel economy on my Ram Cummins?

Most owners report fuel economy gains of 1 to 3 MPG after an EGR delete on a 6.7 Cummins, with the biggest improvements showing up under heavy tow loads where the engine runs more efficiently with a clean intake charge.
The engine no longer wastes combustion efficiency diluting the charge with inert exhaust gas, and the reduced exhaust backpressure lets the variable-geometry turbocharger operate more efficiently.
Results vary based on tune calibration, driving style, and whether the DPF and DEF systems are also removed as part of a full competition build.

How long does it take to install a 6.7 Cummins EGR delete kit?

For an experienced DIY mechanic with the right tools, a 6.7 Cummins EGR delete kit installation typically takes 2 to 4 hours, including coolant drain, component removal, block-off plate installation, and coolant refill.
Professional shops generally charge 4 to 6 hours of labor for a full EGR and throttle valve delete on a B6.7, especially on 2013 and newer trucks with SCR and DEF systems that require additional disassembly.
Spray penetrating oil on exhaust manifold bolts the night before, drain coolant completely before starting, and confirm your tune is flashed before physically removing hardware to avoid limp mode.

Do I need a tuner after deleting the EGR on my Cummins B6.7?

Yes, a proper off-road tune is mandatory when deleting the EGR on a Cummins B6.7, not optional.
The ECM constantly monitors EGR valve position, flow rate, and cooler efficiency; without a matching delete tune, it will detect the missing EGR flow and throw fault codes that can trigger limp mode.
A properly calibrated competition tune disables EGR monitoring circuits, optimizes fueling and timing for the clean intake charge, and ensures the engine runs correctly without the factory emissions hardware in place.

What years does the Cummins B6.7 EGR delete kit fit?

The Cummins B6.7 naming convention replaced ISB6.7 starting in 2017 for EPA 2017 compliance, but EGR delete kits cover the full 6.7L Cummins production run from 2007.5 to the current 2025 next-generation B6.7.
Fitment is segmented by emissions generation: 2007.5 to 2009 with EGR and DPF, 2010 to 2012 with refined emissions, 2013 to 2019 with SCR and DEF, and 2019 to 2024 with modified ECM and CGI block updates.
Always confirm your truck year, whether it is a pickup or cab-and-chassis, and whether your kit requires specific hardware unlocking for 2019 and newer models before purchasing.

How long will a deleted 6.7 Cummins engine last?

A properly deleted and well-maintained 6.7L Cummins, free from the detrimental effects of the EGR system, commonly exceeds 500,000 to 750,000 miles in off-road and competition service with original internal components.
Without soot recirculation, the intake manifold stays clean, engine oil stays cleaner longer, and thermal stress on pistons, rings, and cylinder walls drops significantly under sustained operation.
Key practices include full-synthetic oil changes every 5,000 to 7,500 miles, monitoring exhaust gas temperatures with a pyrometer, and keeping tuning software updated to prevent fueling issues.

Can I reverse an EGR delete on my Cummins B6.7?

Yes, if you keep your factory EGR cooler, valve, throttle valve, gaskets, and hardware stored in a clean, labeled container, you can reinstall the factory system and return the truck to stock configuration.
Reinstallation requires reversing the block-off plate removal, reconnecting the coolant lines to the factory cooler, and reflashing the ECM with a stock tune to re-enable EGR monitoring.
Plan extra time for the reinstall as exhaust manifold bolts may need replacement and the throttle valve gasket should be renewed to ensure a proper seal.

Is an EGR delete legal on my Cummins B6.7?

All EGR delete kits and related products are manufactured for competition and closed-course off-road use only, and operating a deleted vehicle on public roads violates the federal Clean Air Act regardless of state inspection requirements.
Removing or disabling emissions controls voids the factory powertrain warranty, and penalties for non-compliance can include significant fines per violation under federal law.
These kits are intended for dedicated off-road and competition vehicles; purchasers assume all responsibility for compliance with federal, state, and local regulations. We offer free shipping, a one-year warranty on our kits, and a 45-day return policy for fitment verification on competition builds.