Using your K&N air filter is easy. First, locate your factory air box. Then, simply remove the old filter and drop in the new K&N filter. Make sure it fits snugly. As for maintenance, you don't need to replace this filter often. Every 50,000 to 100,000 miles (depending on your driving conditions), you can wash it. Use a K&N cleaning kit, soak the filter in the cleaner, rinse it gently, and let it dry completely. Once dry, re-oil it using K&N filter oil following the instructions on the oil bottle. Remember, always keep it dry before installing it back in your air box. Also, make sure to check your vehicle's manual for any specific instructions related to your Mustang model.
