K&N 06-09 & 12-13 Honda TRX450ER / 06-09 TRX450R Powerlid Air Box CoverBrand K&N Engineering Part Number HA 4506 T Category Air Filters Air Filters Drop In Condition Brand New Original Manufacturer Packaging The K&N Powerlid eliminates restrictive ATV intake snorkels by replacing the stock air box lid with a high airflow filter lid. The Powerlid works in conjunction with a K&N replacement air filter (sold separately) to provide excellent filtration with less restriction allowing increased airflow for more horsepower. The