Using the K&N Performance Intake Kit is easy. First, make sure your vehicle is turned off and cool. Then, follow the step - by - step installation guide included with the kit, which should take less than 90 minutes. Once installed, your vehicle will enjoy increased horsepower and torque. When it comes to maintenance, under normal highway driving, you can go up to 100,000 miles before servicing the filter. To service the filter, simply remove it and wash it with the recommended cleaning solution, then let it dry and re - oil it. Remember, in California, some intakes may not be legal for use on pollution - controlled vehicles, so always check the CARB status for your specific part and vehicle.