"Keep your air filter cleaner with this Engine and CVT Pre-Filter Kit. This filter acts as an extra layer of protection for your engine and CVT in harsh riding conditions, blocking particles larger than 0.005"" (0.13 mm). Adds extra protection to your engine and CVT in harsh riding conditions. Helps keep air filter cleaner. Filter blocks particles larger than 0.005"" (0.13 mm). Recommended when vehicle is equipped with track kits used in snow condition. Ease cleaning of snow accumulation on engine & CVT air intake. Includes pre-filters for both the Engine and CVT intakes (2 pieces per kit)."