Using the K&N cold air intake kit is easy. First, make sure your vehicle is turned off and cooled down. Follow the included instructions to install the kit, which usually takes less than 90 minutes. The kit comes with a mandrel - bent aluminum intake tube and a washable, reusable High - Flow Air Filter. Under normal highway driving conditions, you can go up to 100,000 miles before servicing the filter. When it's time for maintenance, simply wash the filter with the recommended cleaning solution and let it dry. Re - oil the filter before reinstalling it. Remember, some intakes are not legal for sale or use on pollution - controlled motor vehicles in California, so always check the CARB status for your specific vehicle part.