Filters

Air filters are an important part of the engine’s intake system and have a major impact on air quality, operational reliability and the overall function of the car. The job of the filter is to clean the air before it reaches the engine, so dust, dirt and other particles are not drawn into the intake. This is relevant for standard cars, modified road cars, motorsport cars and custom builds, where a stable and clean air supply is important.

When choosing an air filter, it is not only about whether it fits physically. Filter type, size, material and construction also affect how it works in practice. Some air filters are used as direct replacements for the original filter in the airbox, while others are used in open intake solutions, custom-built airboxes or universal setups. The right choice therefore depends on the car, available space, intake layout and the intended purpose.

K&N air filters are among the best-known choices when a quality filter is wanted for both standard and performance-oriented solutions. K&N is especially known for its oiled cotton filters, which are designed to be cleaned and reused. This makes them interesting for many who want a solution that can be maintained rather than simply replaced. K&N air filters are used both as panel filters for original airboxes and as open filters for universal intake solutions.

One of the advantages of K&N air filters is that they combine filtration with high airflow. This means they are often chosen by both enthusiasts and professionals who want a well-thought-out intake solution with focus on function, quality and long service life. At the same time, it is important to understand that the overall effect of an air filter always depends on the rest of the intake system. A good filter is one part of a complete solution, where placement, temperature, shielding and airflow routing also play a major role.

Open air filters are often used in projects where a more flexible setup is wanted, or where special solutions are used because the original airbox no longer fits. In these types of setups, filters are often chosen based on connection diameter, filter height, outer dimensions and the space available in the engine bay. In this type of solution, it is also important to consider heat from the engine bay, placement in relation to fresh air and possible use of a filter box or protective cover.

Panel filters, on the other hand, are often relevant if you want to keep the original airbox while still choosing a quality filter. This can be an obvious solution on cars where you want a more discreet setup, but still want an air filter with good properties. K&N panel filters are popular in this type of solution because they fit directly in many original air filter housings and can be maintained over time with proper cleaning and oiling.

Maintenance is especially important when it comes to K&N air filters and other oiled cotton filters. When the filter is cleaned, not only dirt is removed, but also the oil that helps capture fine particles. This is why the filter must always be re-oiled correctly after cleaning. A filter that receives the right care can be used again and again as part of ongoing service. This is exactly one of the reasons why many choose K&N air filters as a long-term solution.

For installation, our T-bolt clamps can be used.

If you are missing a specific K&N filter for your car, you can find it on K&N’s website, and then we can source it for you.