![]() The K&N filter is economical because it's the last air filter you'll have to buy for your car. Contrast this with a paper filter that only traps dirt on its surface as the surface area becomes clogged, the airflow rate goes down.Įach K&N air filter is custom designed to fit into your existing factory air box. The thickness of the layers also allows the K&N filter to trap dirt and dust on many levels, trapping more dirt without decreasing airflow. The layers of oiled cotton fibers in the K&N filter trap dirt particles that are smaller than the holes in the filter media. The resulting K&N filter not only delivers increased airflow while trapping dirt particles that could harm your engine, that level of airflow is maintained even as the filter gets dirty. The cotton is then treated with a specially formulated grade of oil that causes tackiness throughout the cotton's microscopic strands. K&N's solution was a filter design consisting of 4 to 6 layers of cotton gauze sandwiched between two aluminum wire screens. But just increasing airflow without ensuring adequate filtration under those conditions would result in a ruined engine. Increased airflow improves the efficiency of the combustion process, increasing horsepower and torque. K&N's initial goal was to develop a filter that would deliver increased airflow during dirty, dusty off-road racing conditions. The secret is in the K&N filter's construction. K&N air filters increase airflow without decreasing filtration ability, and the increased airflow remains consistent throughout the filter's service interval. And airflow decreases as these air filters become dirty. ![]() OEM filters, which are usually made of paper, filter adequately but at the expense of airflow. Many high-performance filters deliver better airflow, but sacrifice filtering ability and engine protection in the process. To learn more about cold air intake kits and other performance upgrades, visit our How-To-Hub article.Most air filters on the market are a compromise. O'Reilly Auto Parts carries a variety of universal and custom-fit cold air intake kits and oiled air filters to help you easily upgrade your vehicle's performance. While cold air intake kits are relatively easy to install, they may void your manufacturer's warranty, so always check your warranty terms before modifying your vehicle. Cold air intake kits are considered performance parts and can be custom-fit for specific vehicles and applications. Increased air flow into your vehicle's engine allows it to "breathe" better, increasing your engine's performance. Cold air intakes can also increase the amount of air entering your engine by increasing the size of the airflow tubes attached to the throttle body, delivering less restricted and more consistent airflow into the engine. This oxygen-rich air allows the engine to burn fuel more efficiently during the combustion cycle, ultimately leading to an increase in overall power and gas mileage. Cooler air is denser and contains more oxygen concentration than the warm air that the vehicle's factory intake system may have been pulling from the engine bay. Installing a cold air intake moves the air filter farther away from the heat produced by the running engine, allowing continuous low-temperature airflow to enter the engine's intake. Cold air intake kits replace the factory air filter and air filter housing and often require little modification to install properly and securely. A cold air intake kit is an aftermarket modification that can be added to your vehicle's air intake system to increase engine horsepower, fuel efficiency, and torque. Your vehicle's air intake system draws oxygen from outside the car into the engine's intake manifold, which is mixed with fuel in an appropriate ratio for combustion. How Does a Cold Air Intake Increase Vehicle Performance?
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