Using your K&N drop - in air filter is easy. First, open your vehicle's factory air box. Carefully remove the old air filter and place the K&N filter in its spot. Make sure it fits snugly and close the air box. When it comes to maintenance, keep an eye on the filter's dirt level. When it gets dirty, you can wash it. Use a K&N air filter cleaning kit. Wash the filter gently with the cleaner, rinse it thoroughly, and let it dry completely. Then, re - oil the filter using K&N filter oil following the instructions on the oil bottle. Note that you should always use genuine K&N cleaning and oiling products. Avoid using harsh chemicals or excessive force when cleaning the filter, as this can damage the cotton media. With proper care, your K&N filter will serve you well for your vehicle's entire lifespan.