K&N offers a guaranteed increase in horsepower and torque for all K&N intake systems. Dynamometer tests indicating estimated horsepower and torque increases compared to the OEM intake system will appear on the "Product Details" page for each performance intake system. Results will vary.

No. In the United States, in order for the manufacturer of a warranted product to void or deny warranty coverage of a repair due to the use of an aftermarket part, the manufacturer must provide proof that the aftermarket part is the cause of the necessary repair. These rights are protected under the Consumer Products Warranty Act of 1975 (also referred to as the Magnuson-Moss Warranty Act).

K&N® cold air intake systems allow for increased airflow to your engine, which results in an increase in horsepower and torque.

K&N® performance air intake systems are designed to create a less restrictive path for airflow to reach the engine by removing the stock intake tubing that can increase restriction, and also by utilizing high airflow filter media.

In a K&N cold air intake system, air first passes through a performance air filter—typically a High-Flow Air Filter™, which is designed to provide up to 50% more airflow than a disposable paper filter—and then passes through a specially designed tubing system that helps provide a smooth path for airflow.

Roto-Molded High-Density Polyethylene (HDPE) Intake Systems: 57-Series, 63-Series

High-density polyethylene (HDPE) rotationally molded tubes help increase the volume of airflow to your engine, and provide a guaranteed increase in horsepower and torque. These systems are paired with a washable, reusable High-Flow Air Filter™ featuring oiled cotton filter media, and the oversized, conical design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield or air box helps protect intake air from the high temperature of your engine bay, and the entire system can typically be installed in less than 90 minutes.

*Certain 57-series and 63-series intakes are designed to function with the factory air box, and feature a panel filter paired with a custom roto-molded intake tube.

Mandrel-Bent Aluminum Intake Systems: 69-Series, 77-Series

Mandrel-bent aluminum intake tubes help provide an increase in airflow to your engine, and each 69-series and 77-series intake system offers a guaranteed increase in horsepower and torque. These systems are paired with a washable, reusable High-Flow Air Filter™ featuring oiled cotton filter media, and the oversized, conical design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A steel heat shield helps protect intake air from the high temperature of your engine bay, and the system can typically be installed in less than 90 minutes.

Blackhawk Induction™ Air Intake Systems: 71-Series

Blackhawk Induction™ air intake systems feature an oil-free synthetic filter media, black powder-coated aluminum intake tube, and all-black components. The layered DRYFLOW® synthetic filtration media provides increased airflow and exceptional engine protection without requiring oil, and a steel heat shield helps protect intake air from the high temperatures of your engine bay. The system can typically be installed in less than 90 minutes.

K&N® does not make any claims or guarantees in terms of increased gas mileage with the use of K&N filters or intakes, due to a vast number of variables that can affect a vehicle’s gas mileage.

An internal combustion engine operates by burning a mixture of fuel and oxygen within the engine’s cylinders. The fuel injectors provide a precise amount of fuel, which combines with air delivered by the air intake system. A spark plug then ignites the volatile gas, creating an explosion that forces the piston downward—turning the crankshaft. The piston-moving force that’s created during the combustion cycle is what produces horsepower. K&N performance products are designed to increase the efficiency of your engine’s combustion process.

Once you determine that the filter included in your intake kit needs to be cleaned, K&N® air filter cleaning products help restore your air filter to like-new condition. There are specific cleaning products for each type of filter. Follow this link to view complete cleaning instructions and available products.

Maintaining the proper air-to-fuel ratio (AFR) is critical for engine performance, and relates to the amount of air versus the amount of fuel used by an engine for combustion. A correct, stoichiometrically balanced AFR produces combustion with perfect efficiency, excluding other factors. For gasoline engines, the theoretically perfect chemical ratio is 14.7 : 1—14.7 parts air to one part fuel. In effect, this means that an engine requires almost fifteen times more air than fuel for efficient combustion—which emphasizes the importance of providing a high volume of air through an intake system.

K&N® intake systems are not compatible with vehicles equipped with a body lift. A body lift will raise the body and fenders of the vehicle above the engine and frame, and since most K&N intake kits mount to both the engine and the fender, the lift would move the mounting points needed to install the kit—possibly resulting in the tube coming loose, coming into contact with the hood or other engine components, and even breaking. In most cases, serious modifications would be required to make the kit work, and such modifications would void the 10-Year/Million Mile Limited Warranty.

*K&N intake systems are compatible with vehicles with a suspension lift installed.

At this time, it is not recommended to install a K&N® intake system on a vehicle with a throttle body spacer. A throttle body spacer will move the opening of the throttle body away from its stock location. Since K&N develops intake kits on vehicles with a throttle body in the factory location, the addition of a spacer would add length to the intake tube, pushing it away from its mounting points—and possibly causing the tube to come loose, come into contact with the hood or other engine components, or even break. In most cases, serious modifications would be required to make the kit work, and such modifications would void the 10-Year/Million Mile Limited Warranty.