Using this K&N replacement air filter is easy. Just remove the old air filter from your Polaris Ranger RZR 170 or RZR 170 EFI and replace it with the new K&N filter. Make sure it fits snugly. When riding in extremely dirty or dusty conditions, it's a good idea to check the filter more frequently. For maintenance, wash the filter with a mild detergent and water when it gets dirty. Let it dry completely before reinstalling. Don't use harsh chemicals as they can damage the filter. With proper care, this filter will serve you well for a long time.