The Outerwears Pre-Filters were designed strictly to work only with K&N Air Filters. These will not fit stock Air Filters.

Founded over 28 years ago, Outerwears was created to fulfill a desperate need to keep the Air filter and engine clean during off road racing. Racers and engine builders were experiencing loss of horsepower and engine damage due to sand, dirt, and other debris prematurely packing (clogging) the filter and often passing through the filter into the engine. Filters loading up with dirt meant loss of horsepower and in many cases loss of a race. Race crews were noticing severe engine damage due to dirt entering into the engine. Thus, a true need for a product designed to keep out additional dirt without interfering with airflow was necessary.

Outwears Pre-Air Filter Features:

• Works only with K&N Air Filters, not stock Air Filters.
• Over twenty-five years of product development
• Developed Pre-filter to deflect debris, maintaining peak airflow
• Originally developed for off road applications
• Pre-filter manufactured from needs of racers and engine builders