Using this K&N intake kit is easy. First, make sure your engine is cool. Then, follow the step - by - step instructions in the installation guide to install the kit, which typically takes less than an hour. When driving, you'll notice improved engine performance right away. For maintenance, under normal highway driving, you can go up to 100,000 miles before servicing the filter. When it's time, remove the filter, wash it with the appropriate cleaner, and let it dry completely. Re - oil the filter according to the instructions. Also, remember that in California, some intakes may not be legal for pollution - controlled vehicles, so always check the CARB status for your specific vehicle before use.