Frequently Asked Questions About Cold Air Intake Kits for Diesel Trucks
1. How much horsepower does a cold air intake add to a 6.7 Powerstroke?
A cold air intake kit on a 6.7 Powerstroke typically adds 10 to 25 horsepower at the wheels, depending on the year of your truck and whether it has been tuned.
The horsepower gain comes from reducing the restriction at the turbocharger compressor inlet. The factory intake system on the 6.7L Powerstroke is designed with noise reduction as a priority, which means the stock airbox and tubing create a measurable pressure drop that the turbo must overcome.
By replacing the stock system with a larger diameter 4 inch cold air intake kit and a high-flow filter, the turbo ingests air more easily and operates at a higher efficiency point on its compressor map. On trucks with performance tuners already installed, the intake kit yields even larger gains because the engine is already flowing more fuel and desperately needs the additional air.
You will also notice faster turbo spool and improved throttle response, especially when accelerating from a stop or when the torque converter locks up under load.
2. What is the advantage of a 4 inch cold air intake kit over stock?
The primary advantage of a 4 inch cold air intake kit is the dramatic increase in airflow capacity compared to the factory intake tubing. Stock intake tubes on most Ford Powerstroke and Dodge Cummins diesel trucks are typically 3 to 3.5 inches in inside diameter, with corrugated sections and resonators that further reduce effective flow area.
A 4 inch mandrel-bent aluminum tube has roughly 30 percent more cross-sectional area than a 3.5 inch factory tube. This larger diameter means the air velocity through the intake is lower for the same mass flow rate, which reduces friction losses and pressure drop across the entire intake tract.
The mandrel-bending process also ensures that the internal diameter remains constant through every bend, unlike the factory corrugated rubber hoses that pinch and create turbulence. The result is a smoother, straighter path from the air filter to the turbo inlet, which improves compressor efficiency and reduces turbo lag.
For trucks that tow heavy loads or run performance tuners, the 4 inch cold air intake kit is the preferred upgrade because it removes the intake as a limiting factor in the engine's ability to make power.
3. Do cold air intake kits improve fuel economy on diesel trucks?
Cold air intake kits can improve fuel economy on diesel trucks by a small but measurable amount, typically 0.5 to 1.5 miles per gallon under consistent highway driving conditions. The improvement comes from reducing the pumping work the engine must do to ingest air through a restrictive factory intake.
When the turbocharger does not have to work as hard to pull air through the intake, the engine operates more efficiently and burns fuel more completely. Cooler, denser intake air also contributes to more complete combustion, which extracts more energy from each unit of fuel injected into the cylinder.
The fuel economy benefit is most noticeable during steady-state highway cruising and light towing, where the engine spends extended periods at a constant RPM. During aggressive acceleration or heavy towing, any fuel economy improvement is offset by the increased fueling the engine demands to take advantage of the extra airflow.
Most diesel truck owners who install a cold air intake kit report the improvement as a secondary benefit, since the primary motivation is usually increased power and lower EGTs rather than fuel savings.
4. What are the best cold air intake kits for Ford Powerstroke and Cummins?
The best cold air intake kits for diesel trucks share several key characteristics: mandrel-bent aluminum tubing, a high-flow reusable filter element, and a direct bolt-on design that requires no permanent modifications to the truck.
For the 6.7 Powerstroke, a 4 inch cold air intake kit provides the largest airflow improvement because the 6.7L engine displaces a significant volume of air at boost. For the 6.0 Powerstroke and 6.4 Powerstroke, the cold air intake reduces turbo lag and helps control EGTs, which is especially valuable on the 6.0L where elevated exhaust temperatures are a known concern.
For the 7.3 Powerstroke, the cold air intake pipe with an oiled filter is a popular upgrade that wakes up the older engine's throttle response. For the 6.7 Cummins, the 4 inch cold air intake kit with filter opens up the intake path significantly compared to the restrictive factory airbox on the Dodge Ram 2500 and 3500.
The most important factor in choosing the best cold air intake kit for your truck is confirming the correct fitment for your specific year, make, model, and engine combination.
5. How difficult is it to install a cold air intake kit on a diesel truck?
Installing a cold air intake kit on a Ford Powerstroke or Dodge Cummins diesel truck is a straightforward job that most owners can complete in 30 to 60 minutes with basic hand tools.
The process involves removing the factory airbox, intake tubing, and filter, then bolting in the new cold air intake components using the supplied hardware and brackets. Most kits are designed as direct bolt-on replacements that use the factory mounting points and require no drilling, cutting, or permanent modifications to the truck.
On the 6.7 Powerstroke and 6.0 Powerstroke, you may need to loosen or remove a few hose clamps and electrical connectors to free up the factory intake tube. On the 7.3 Powerstroke, the intake pipe is more accessible because the engine bay is less crowded. On the 6.7 Cummins, the airbox is located in the driver side front corner of the engine bay and is easy to reach.
Always disconnect the battery before starting the installation to prevent any electrical issues during the swap. After installation, start the engine and check for any unusual noises or loose connections before driving.
6. Oiled vs dry air filter: which is better for a cold air intake system?
Both oiled and dry air filters have advantages, and the right choice depends on your driving conditions and maintenance preferences.
Oiled cotton gauze filters, like the one included with our 7.3 Powerstroke cold air intake pipe kit, flow more air than dry filters because the oil-treated fibers create a sticky surface that captures fine particles while maintaining high porosity. Oiled filters typically flow 10 to 15 percent more air than an equivalent dry filter, which makes them the preferred choice for maximum performance.
Dry synthetic filters are easier to maintain because they do not require oiling after cleaning. You simply wash, dry, and reinstall. Dry filters are a good choice for trucks driven in dusty conditions where frequent cleaning is necessary, since re-oiling a filter correctly takes more time and care.
Both types of filter are washable and reusable, lasting the lifetime of the truck with proper maintenance. For most diesel truck owners, either type provides a significant upgrade over the disposable paper factory filter.
7. What types of cold air intakes are available for diesel trucks?
There are three main types of cold air intake systems available for Ford Powerstroke and Dodge Cummins diesel trucks.
The first type is the open-element intake, which replaces the factory sealed airbox with a cone filter mounted on the end of the intake tube. Open-element intakes flow the most air because the filter has unrestricted access to the engine bay atmosphere. However, they can draw in warmer underhood air during low-speed driving or when stopped in traffic.
The second type is the enclosed airbox intake, which houses the high-flow filter inside a replacement airbox that seals against the hood or fender. This design draws cooler air from outside the engine bay through a dedicated duct, similar to the factory setup but with much higher flow capacity. Enclosed airbox intakes are the best choice for trucks that see a mix of city driving and highway towing.
The third type is the intake tube kit, which replaces only the factory tubing between the airbox and the turbo while retaining the stock airbox. Intake tube kits are a good option for owners who want improved flow without replacing the entire intake system. Our cold air intake kits include both the intake tube and the filter element for a complete upgrade.
8. Does a cold air intake void the factory warranty on a diesel truck?
In the United States, installing a cold air intake kit does not automatically void the factory warranty on your diesel truck. Under the Magnuson-Moss Warranty Act, the manufacturer cannot deny a warranty claim unless they can prove that the aftermarket part directly caused the failure.
For example, if the air conditioning compressor fails, the dealer cannot blame the cold air intake kit because the two systems are unrelated. However, if the turbocharger fails and the dealer determines that an improperly installed intake allowed unfiltered debris into the compressor, they could deny the warranty claim for that specific component.
To protect your warranty coverage, make sure the cold air intake kit is properly installed with all connections tight and the filter element correctly seated. Choose a kit that is designed as a direct bolt-on replacement for the factory intake, with no permanent modifications required.
EGR Performance cold air intake kits are engineered for precise fitment and include all necessary hardware for a clean, professional installation that will not raise warranty concerns at the dealership.
9. When should you upgrade or replace your cold air intake tube kit?
You should consider upgrading to a cold air intake tube kit when you notice any of the following signs on your Ford Powerstroke or Dodge Cummins diesel truck.
If you have installed a performance tuner or programmer, the factory intake becomes a restriction that limits the power gains from your tuning investment. Upgrading to a cold air intake kit removes that restriction and allows the tuner to deliver the full potential of its fuel and timing calibration.
If you tow frequently and notice the engine running hot or the turbo lagging on long grades, a cold air intake kit helps by reducing intake temperatures and improving turbo response. The cooler, denser air charge keeps EGTs lower and gives the turbo a stronger pull through the midrange.
If your factory intake tubing is cracked, the rubber couplers are deteriorating, or the factory paper filter is clogged beyond what cleaning can fix, it is time for a replacement. Upgrading to a performance cold air intake kit at that point gives you better flow and a reusable filter instead of replacing the stock parts at similar cost.
10. Does a 2014 Ford F250 6.7 Powerstroke benefit from a cold air intake?
Yes, the 2014 Ford F250 with the 6.7L Powerstroke benefits significantly from a cold air intake kit. The 2014 model year falls within the 2011 to 2016 production run, and our 4 inch cold air intake kit is designed specifically for this engine and chassis combination.
The 6.7 Powerstroke in the 2014 F250 uses a factory airbox and intake tubing that were designed to balance airflow with noise reduction and emissions requirements. Replacing the stock system with a 4 inch mandrel-bent aluminum intake tube and high-flow filter reduces the restriction the turbo faces at the compressor inlet.
On the 2014 6.7 Powerstroke, owners typically see faster turbo spool, improved throttle response, and a measurable reduction in exhaust gas temperatures during towing. If the truck has been tuned, the cold air intake kit becomes even more valuable because the engine needs additional airflow to match the increased fueling from the tuner.
The kit bolts directly to the factory mounting points on the 2014 F250 with no drilling or modifications required, making it an easy weekend project that takes less than an hour to install.
