Using the K&N cold air intake kit is simple. First, make sure your engine is cool before starting the installation. Follow the included instructions carefully to install the intake tube, filter, and heat shield or air box. It usually takes less than 90 minutes to finish. During normal use, the filter can go up to 100,000 miles between services under normal highway driving. However, if you drive in dusty or dirty conditions, you may need to service it more often. To service the filter, remove it and wash it with the appropriate cleaning solution. Let it dry completely and re - oil it before reinstalling. Also, keep in mind that some intakes are not legal for use on pollution - controlled vehicles in California. Always check the product specifications for the CARB status of your specific part.