Using this S&B replacement filter is easy. First, make sure your engine is off and cooled down. Remove the old filter from your S&B intake system. Then, simply insert the new filter in its place. For the cleanable cotton filter, if you drive in the city or on highways, you can clean it with the S&B cleaning kit when it gets dirty. This will help it last a long time. For the dry filter used in dusty areas, you can use compressed air to blow out the dust and extend its life. When it's completely worn out, just dispose of it. Remember, this filter only fits S&B intake systems, not OEM ones. If you buy it from an authorized dealer, it comes with a million - mile warranty, but make sure to use it under normal driving conditions on the appropriate vehicles.