6.7 Cummins Cold Air Intake

Why Does Your 6.7 Cummins Need a Cold Air Intake?

Restricted Factory Airbox Chokes Turbo Response and Raises EGTs

The stock intake on the 6.7L Cummins was engineered for emissions compliance, not performance. The factory airbox draws through a narrow resonator tube with corrugated walls that create turbulence and restrict volume. Under heavy throttle, especially on tuned trucks or while towing at altitude, this restriction forces the turbo to work harder for the same boost level. That extra effort translates directly into higher exhaust gas temperatures, slower turbo spool, and lost mid-range torque.

Soot and Dust Contamination Degrade OEM Filter Media Over Time

The factory paper air filter element is designed for a balance of filtration and flow, but it degrades quickly in dusty job site environments. As the pleated media loads up with fine particulate, airflow drops steadily while the filter still looks serviceable. A quality aftermarket cold air intake uses a reusable oil-impregnated cotton gauze or dry synthetic filter element that maintains consistent flow characteristics through repeated cleaning cycles, giving you reliable airflow whether your truck has 20,000 miles or 200,000.

Heat Soak From the Engine Bay Kills Power on Stock Intakes

The OEM intake routing pulls air through the engine compartment, where radiant heat from the exhaust manifold, turbo housing, and cylinder head saturates the intake charge. At operating temperature, under-hood air can exceed 200 degrees Fahrenheit, reducing oxygen density and robbing your 6.7 Cummins of the combustion efficiency it needs for strong, consistent power delivery. A true cold air intake relocates the filter inlet to draw from a cooler, outside air source, keeping intake temperatures closer to ambient.

What Can a Cold Air Intake Solve?

Component-Level Fixes That Deliver Measurable Results

A well-designed 6.7 Cummins cold air intake addresses the root cause of three common performance complaints. First, the smooth-bore intake tube eliminates the turbulence and pressure drop caused by the factory corrugated resonator hose, restoring full turbo response and reducing lag by 15 to 20 percent under load. Second, the high-flow conical filter element increases available airflow by up to 50 percent compared to the stock paper element, giving your variable-geometry turbocharger the volume it needs to maintain target boost without overworking. Third, the relocated filter inlet pulls denser, cooler air from outside the engine bay, lowering intake air temperatures by 20 to 40 degrees Fahrenheit and directly reducing EGTs during sustained towing or high-performance driving.

Shop Cold Air Intake by Ram Engine & Fitment Guide

• Cold Air Intake for 6.7L Cummins Dodge Ram 2500 3500 (2007.5-2012) - Fits the 6.7L ISB Cummins in the 2007.5 through 2012 Dodge Ram 2500 and 3500, replacing the restrictive factory airbox with a mandrel-bent aluminum intake tube and high-flow reusable filter for improved throttle response and reduced EGTs under towing loads.
• 4" Cold Air Intake Kit w/ Filter for 6.7L Cummins (2007.5-2012) - Fits the first-generation 6.7L Cummins in the 2007.5 to 2012 Dodge Ram 2500 and 3500, featuring a full 4-inch diameter intake pipe, precision TIG-welded construction, and a reusable conical air filter designed for maximum airflow and cooler intake charge temperatures.
• Air Intake Resonator Lower Hose Tube Duct (2007-2018) - Fits all 6.7L Cummins Ram 2500 and 3500 models from 2007 through 2018 as a direct replacement for the cracked, collapsed, or deteriorated OEM resonator hose, restoring proper intake airflow and eliminating unmetered air leaks that trigger fault codes.
• Air Intake Pressure Sensor for 6.7L Cummins (2007-2018) - Fits the 6.7L Cummins in Ram 2500 and 3500 trucks from 2007 through 2018, replacing the failed or inaccurate OEM intake pressure sensor to restore proper boost reading and fuel management for consistent engine performance.

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What does a cold air intake do for a 6.7 Cummins?
A cold air intake replaces the restrictive factory airbox and intake tubing on your 6.7L Cummins with a larger diameter, smooth-bore intake pipe and a high-flow reusable filter element.
The system draws cooler, denser air from outside the engine bay rather than ingesting heated under-hood air that can exceed 200 degrees Fahrenheit at operating temperature.
Denser air carries more oxygen per cubic foot, which improves combustion efficiency, reduces exhaust gas temperatures, and restores throttle response that the stock intake was choking off.

How much horsepower does a cold air intake add to a 6.7 Cummins?
On a stock or lightly modified 6.7L Cummins, a quality cold air intake typically adds 10 to 25 horsepower and a comparable bump in torque at the rear wheels.
These gains come from the increased airflow volume and reduced intake air temperature, which lets the engine management system optimize fuel delivery.
When paired with a performance tuner, upgraded turbo, or exhaust modifications, the horsepower gains can be even more substantial because the engine is no longer starved for intake air at higher power levels.

Is a cold air intake worth it on a 6.7 Cummins?
A cold air intake is worth the investment if you tow heavy loads, run a tuned truck, or drive in conditions where exhaust gas temperature management matters.
The factory intake was designed around emissions compliance and noise reduction, not peak airflow.
For a stock daily driver that never sees heavy throttle, the OEM box does the job. But for any truck working hard, pulling trailers, or running performance modifications, the cooler intake charge and improved airflow deliver real, noticeable benefits in throttle response and EGT control.

Will a cold air intake improve fuel mileage on my 6.7 Cummins?
Some 6.7 Cummins owners report a modest improvement of 0.5 to 1.5 MPG after installing a cold air intake, though results vary based on driving habits and truck configuration.
The improvement comes from more efficient combustion: cooler, denser air allows the engine to extract more energy from each fuel injection event, which means less throttle input is needed to maintain the same speed and load.
Highway cruising and steady-state towing are where the fuel economy benefit is most consistent, because the engine operates at a stable RPM range where the improved airflow has the greatest effect.

Does a cold air intake lower EGTs on a 6.7 Cummins?
Yes, a properly designed cold air intake can lower exhaust gas temperatures by 20 to 50 degrees Fahrenheit on a 6.7L Cummins, especially under sustained load.
Cooler intake air reduces the thermal burden on the combustion chamber because the engine does not need to work as hard to compress the charge.
This EGT reduction is particularly valuable when towing heavy trailers up long grades, where temperatures can spike quickly and stress the turbo, exhaust manifold, and cylinder head.

What is the best cold air intake for a 6.7 Cummins?
The best cold air intake for your 6.7 Cummins depends on your truck year and how you use it. For 2007.5-2012 Ram 2500 and 3500 trucks, our 4-inch cold air intake kit with reusable filter provides maximum airflow and a direct bolt-in fit.
Look for a kit with mandrel-bent aluminum tubing, high-temperature silicone couplers, and a sealed or semi-sealed filter housing that draws air from outside the engine bay.
The key is matching the intake diameter and filter capacity to your turbo and power goals, rather than buying the biggest open-element filter you can find.

Can I install a cold air intake on a 6.7 Cummins myself?
Most 6.7 Cummins cold air intake kits are designed for a straightforward, bolt-in installation that takes 30 to 60 minutes with basic hand tools.
The kit uses factory mounting points and includes all necessary hardware, including stainless steel T-bolt clamps, silicone couplers, and any required bracketry.
No cutting, welding, or tuning is required for a basic cold air intake install on a stock truck, though a performance tune can help you realize the full potential of the increased airflow.

Does a cold air intake void the warranty on a 6.7 Cummins?
Under the Magnuson-Moss Warranty Act, a dealer cannot void your entire vehicle warranty simply because you installed an aftermarket cold air intake.
However, if a failure can be directly traced to the intake system, such as an unfiltered air contaminant damaging the turbo, that specific repair may not be covered under warranty.
Our intake kits use high-flow reusable filters with filtration efficiency ratings above 99 percent, which meets or exceeds OEM filtration standards when properly maintained.

What years of the 6.7 Cummins does this cold air intake fit?
Our cold air intake kits are designed for specific generations of the 6.7L Cummins. The primary intake kit fits 2007.5 through 2012 Dodge Ram 2500 and 3500 models equipped with the 6.7L ISB Cummins turbo diesel.
We also carry the air intake resonator hose and intake pressure sensor for 2007 through 2018 Ram 2500 and 3500 models, covering the 2013-2018 generation as well.
Always verify fitment by checking the product description against your specific year, make, model, and engine before ordering, or contact our 24/7 live support team for assistance.

Are cold air intakes legal for street use on a 6.7 Cummins?
Cold air intake systems sold by EGR Performance are intended for competition and closed-course off-road use only.
Installation of these products on emissions-controlled vehicles operated on public highways may violate local, state, or federal emissions regulations, including the Clean Air Act.
Customers are responsible for verifying compliance with all applicable laws in their jurisdiction. We offer free shipping on all orders, a 1-year warranty against manufacturing defects, and a 45-day return policy so you can shop with confidence.