Using your K&N drop - in air filter is simple. First, locate your vehicle's factory air box. Open it up and carefully remove the old air filter. Then, place the K&N filter in the same spot where the old one was. Make sure it fits snugly and close the air box. That's it! For maintenance, it's recommended to clean the filter every 50,000 to 100,000 miles, depending on your driving conditions. If you drive in a dusty or dirty environment, you may need to clean it more often. To clean, use K&N's filter cleaning kit. Follow the instructions on the kit, which usually involves soaking the filter in the cleaner, rinsing it gently, and then letting it dry completely. Once dry, re - oil the filter using K&N's filter oil. When handling the filter, be gentle to avoid damaging the cotton media. Also, always make sure the filter is completely dry before re - installing it in your vehicle.