Are more expensive car air filters really worth the extra cost? The answer is yes, there is a noticeable difference. Aftermarket K&N filters can improve power and efficiency of the car at low speeds, but at higher speeds they can reduce efficiency due to increased air flow. The numbers may be small, but it is worth considering if you are looking to modify your vehicle. Cabin air filters are designed to clean the air that enters the car's cabin and protect you and your passengers from dust particles, mold spores, exhaust gases, and allergens.
High-performance air filters, also known as high-flow air filters, differ from regular air filters in that they offer more power and torque than factory filters. On the test bench, aftermarket filters produce more than the OEM unit, with the K&N filter providing an increase of about four horsepower and five pounds of torque. Technically, a high-performance air filter is called a high-flow air filter, which explains well how it differs from a regular air filter. It's important to note that high-performance air filters are considered a modification and can void your warranty if you have a new vehicle that's still within the warranty period.
Replacing the air filter regularly can help your heating, ventilation, and air conditioning (HVAC) system work efficiently in both hot and cold climates. The high-performance air filter will not only slightly increase your horsepower, but it will also improve your vehicle's fuel economy. Air is a fundamental factor in the internal combustion process that occurs inside the engine, and ensuring that the vehicle has adequate air flow can maximize engine power and efficiency.