04-05 HONDA TRX450R: Outerwears Airbox Cover (Black) Founded over 33 years ago, Outerwears was created to fulfill a desperate need to keep the Air filter and engine clean during off road racing. They have been on the forefront of pre-filter technology by inventing and developing the water-repellent pre-filter for use in all types of vehicles. Outerwears has a product for virtually any air intake application. Air Box Cover provides optimal airflow increase. Added protection from loose dirt, debris and water.